Inspirational quotes

Lyrics, Imagine (1971 album)

'Where Do We Go From Here?" as published in Where Do We Go from Here : Chaos or Community? (1967), p. 62; many statements in this book, or slight variants of them, were also part of his address Where Do We Go From Here?" which has a section below. A common variant appearing at least as early as 1968 has "Returning violence for violence multiplies violence..." An early version of the speech as published in A Martin Luther King Treasury (1964), p. 173, has : "Returning hate for hate multiplies hate..."
1960s
Source: A Testament of Hope: The Essential Writings and Speeches
Context: The ultimate weakness of violence is that it is a descending spiral, begetting the very thing it seeks to destroy. Instead of diminishing evil, it multiplies it. Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate. So it goes. … Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that.

Georges Duhamel in THE HEART'S DOMAIN (1919). As it was composed in French, the wording in English may vary in translation. Theodore Geisel / Dr. Seuss was born in 1904, and would have been about 15 years old at the time that it was published. The full text can be found at the link below: We do not know the true value of our moments until they have undergone the test of memory. Like the images the photographer plunges into a golden bath, our sentiments take on color; and only then, after that recoil and that trans-figuration, do we understand their real meaning and enjoy them in all their tranquil splendor.
Misattributed

Variant: When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down ‘happy’. They told me I didn’t understand the assignment, and I told them they didn’t understand life.

As quoted in Journal of France and Germany (1942–1944) by Gilbert Fowler White, in excerpt published in Living with Nature's Extremes: The Life of Gilbert Fowler White (2006) by Robert E. Hinshaw, p. 62. From the context http://books.google.com/books?id=_2qfZRp9SeEC&lpg=PP1&pg=PA62#v=onepage&q&f=false it seems that White did not specify whether he had heard Einstein himself say this or whether he was repeating a quote that had been passed along by someone else, so without a primary source the validity of this quote should be considered questionable.
Some have argued that elsewhere Einstein defined a "miracle" as a type of event he did not believe was possible—Einstein on Religion by Max Jammer (1999) quotes on p. 89 from a 1931 conversation Einstein had with David Reichinstein, where Reichinstein brought up philosopher Arthur Liebert's argument that the indeterminism of quantum mechanics might allow for the possibility of miracles, and Einstein replied that Liebert's argument dealt "with a domain in which lawful rationality [determinism] does not exist. A 'miracle,' however, is an exception from lawfulness; hence, there where lawfulness does not exist, also its exception, i.e., a miracle, cannot exist." ("Dort, wo eine Gesetzmässigkeit nicht vorhanden ist, kann auch ihre Ausnahme, d.h. ein Wunder, nicht existieren." D. Reichenstein, Die Religion der Gebildeten (1941), p. 21). However, it is clear from the context that Einstein was stating only that miracles cannot exist in a domain (quantum mechanics) where lawful rationality does not exist. He did not claim that miracles could never exist in any domain. Indeed, Einstein clearly believed, as seen in many quotations above, that the universe was comprehensible and rational, but he also described this characteristic of the universe as a "miracle". In another example, he is quoted as claiming belief in a God, "Who reveals Himself in the lawful harmony of the world."
As quoted in From Yale to Jail: The Life Story of a Moral Dissenter (1993) by David T. Dellinger, p. 418
Disputed
Variant: There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
Variant: There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.

Variant: Some people want it to happen, some wish it would happen, and others make it happen.

Variant: The best and most beautiful things in the world cannot be seen or even touched. They must be felt with the heart.

Variant: You must give up the life you planned in order to have the life that is waiting for you.

Source: Meditations

Source: The Perks of Being a Wallflower

This is actually a quotation http://books.google.com/books?id=FUIHmRHf8SUC&lpg=PA130&dq=%22not%20on%20fighting%20the%20old%20but%20on%20building%20the%20new%22&pg=PA130#v=onepage&q=%22not%20on%20fighting%20the%20old%20but%20on%20building%20the%20new%22&f=false from a character named Socrates in Way of the Peaceful Warrior: A Book that Changes Lives http://en.wikipedia.org/wiki/Way_of_the_Peaceful_Warrior, by Dan Millman.
Misattributed

Variant: Today is your day, your mountain is waiting. So get on your way.

Variant: Be a rainbow in somebody else's cloud.
Source: Letter to My Daughter

Letter to his son Eduard (5 February 1930), as quoted in Walter Isaacson, Einstein: His Life and Universe (2007), p. 367
1930s

Source: P.S. I Love You

Source: Buddha's Little Instruction Book

Variant: Too many of us are not living our dreams because we are living out fears.

This has become attributed to both Walt Whitman and Helen Keller, but has not been found in either of their published works, and variations of the quote are listed as a proverb commonly used in both the US and Canada in A Dictionary of American Proverbs (1992), edited by Wolfgang Mieder, Kelsie B. Harder and Stewart A. Kingsbury.
Misattributed

Quiet Strength (2000)

Martin Luther
Misattributed

Source: You Learn by Living (1960), p. 29–30
Context: You gain strength, courage and confidence by every experience in which you really stop to look fear in the face. You are able to say to yourself, "I have lived through this horror. I can take the next thing that comes along." … You must do the thing you think you cannot do.

As quoted in Our Precarious Habitat (1973) by Melvin A. Benarde, p. v

As quoted in Networking the Kingdom: A Practical Strategy for Maximum Church Growth (1990) by O. J. Bryson, p. 187; this is the earliest source yet found for this attribution.
Disputed

Ch. IX : Outdoors and Indoors, p. 336; the final statement "quoted by Squire Bill Widener" as well as variants of it, are often misattributed to Roosevelt himself.
Variant: Do what you can, with what you have, where you are.
Attributed to Roosevelt in Conquering an Enemy Called Average (1996) by John L. Mason, Nugget # 8 : The Only Place to Start is Where You Are. <!-- The Military Quotation Book, Revised and Expanded: More than 1,200 of the Best Quotations About War, Leadership, Courage, Victory, and Defeat (2002) by James Charlton -->
Variant: Do what you can, with what you've got, where you are.
Context: There are many kinds of success in life worth having. It is exceedingly interesting and attractive to be a successful business man, or railroad man, or farmer, or a successful lawyer or doctor; or a writer, or a President, or a ranchman, or the colonel of a fighting regiment, or to kill grizzly bears and lions. But for unflagging interest and enjoyment, a household of children, if things go reasonably well, certainly makes all other forms of success and achievement lose their importance by comparison. It may be true that he travels farthest who travels alone; but the goal thus reached is not worth reaching. And as for a life deliberately devoted to pleasure as an end — why, the greatest happiness is the happiness that comes as a by-product of striving to do what must be done, even though sorrow is met in the doing. There is a bit of homely philosophy, quoted by Squire Bill Widener, of Widener's Valley, Virginia, which sums up one's duty in life: "Do what you can, with what you've got, where you are."

Quote attributed to Picasso in TIME, October 4, 1976, Modern Living: Ozmosis in Central Park http://quoteinvestigator.com/2015/03/07/child-art/ http://content.time.com/time/magazine/article/0,9171,918412,00.html
Disputed

1 September 1875, page 226
John of the Mountains, 1938
Context: How infinitely superior to our physical senses are those of the mind! The spiritual eye sees not only rivers of water but of air. It sees the crystals of the rock in rapid sympathetic motion, giving enthusiastic obedience to the sun's rays, then sinking back to rest in the night. The whole world is in motion to the center. So also sounds. We hear only woodpeckers and squirrels and the rush of turbulent streams. But imagination gives us the sweet music of tiniest insect wings, enables us to hear, all round the world, the vibration of every needle, the waving of every bole and branch, the sound of stars in circulation like particles in the blood. The Sierra canyons are full of avalanche debris — we hear them boom again, for we read past sounds from present conditions. Again we hear the earthquake rock-falls. Imagination is usually regarded as a synonym for the unreal. Yet is true imagination healthful and real, no more likely to mislead than the coarser senses. Indeed, the power of imagination makes us infinite.

Source: House Harkonnen

Variant: Success is getting what you want. Happiness is wanting what you get.

Attributed to Winston Churchill in The Prodigal Project : Book I : Genesis (2003) by Ken Abraham and Daniel Hart, p. 224 and other places, though no source attribution is given. It actually derives from an advertising campaign for Budweiser beer in the late 1930s.
Misattributed
Variant: Success is not final, failure is not fatal: it is the courage to continue that counts.
Source: http://quoteinvestigator.com/2013/09/03/success-final/

We Bereaved (1929)

Source: You Learn by Living (1960), p. 29–30
Context: You gain strength, courage and confidence by every experience in which you really stop to look fear in the face. You are able to say to yourself, "I have lived through this horror. I can take the next thing that comes along." … You must do the thing you think you cannot do.

Variant: Look Toward the stars but keep your feet firmly on the ground.
Source: The Greatest American President: The Autobiography of Theodore Roosevelt

As quoted in The Gigantic Book of Teachers' Wisdom (2007) by Frank McCourt and Erin Gruwell, p. 410

Shared on her Facebook page https://www.facebook.com/MayaAngelou/posts/10150251846629796, July 4, 2011

As quoted in Our Precarious Habitat (1973) by Melvin A. Benarde, p. v
Context: Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

Source: I Can Read With My Eyes Shut! (1978)

Variant: You build on failure. You use it as a stepping sone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.

Variant: Life isn't about finding yourself. Life is about creating yourself.

As quoted in Coco Chanel : Her Life, Her Secrets (1971) by Marcel Haedrich

Attributed quotes

As quoted in Blackthink: My Life as Black Man and White Man https://en.wikiquote.org/wiki/Special:BookSources/0688011632 (1970)
1970s

Source: Alice in Wonderland

Source: The Diary of Anne Frank

Hawthorne and His Mosses (1850)
Context: It is better to fail in originality, than to succeed in imitation. He who has never failed somewhere, that man can not be great. Failure is the true test of greatness.
Context: It is better to fail in originality, than to succeed in imitation. He who has never failed somewhere, that man can not be great. Failure is the true test of greatness. And if it be said, that continual success is a proof that a man wisely knows his powers, — it is only to be added, that, in that case, he knows them to be small. Let us believe it, then, once for all, that there is no hope for us in these smooth pleasing writers that know their powers.

Misattributed
Source: This is actually from Zora Neale Hurston, <i>Dust Tracks On the Road,</i> though it is widely attributed to Ms. Angelou's book, <i>I Know Why the Caged Bird Sings.</i>

Pt. 2, ch. 31
Jean Louise (Scout) Finch & Atticus Finch
Source: To Kill a Mockingbird (1962)
Context: "An' they chased him 'n' never could catch him 'cause they didn't know what he looked like, an' Atticus, when they finally saw him, why he hadn't done any of those things... Atticus, he was real nice..."
"Most people are, Scout, when you finally see them."