“An imagination is a powerful tool. It can tint memories of the past, shade perceptions of the present, or paint a future so vivid that it can entice… or terrify, all depending upon how we conduct ourselves today.”

Part 4, Section 7
A Treatise of Human Nature (1739-40), Book 1: Of the understanding
Context: I am first affrighted and confounded with that forelorn solitude, in which I am plac'd in my philosophy, and fancy myself some strange uncouth monster, who not being able to mingle and unite in society, has been expell'd all human commerce, and left utterly abandon'd and disconsolate. Fain wou'd I run into the crowd for shelter and warmth; but cannot prevail with myself to mix with such deformity. I call upon others to join me, in order to make a company apart; but no one will hearken to me. Every one keeps at a distance, and dreads that storm, which beats upon me from every side. I have expos'd myself to the enmity of all metaphysicians, logicians, mathematicians, and even theologians; and can I wonder at the insults I must suffer? I have declar'd my disapprobation of their systems; and can I be surpriz'd, if they shou'd express a hatred of mine and of my person? When I look abroad, I foresee on every side, dispute, contradiction, anger, calumny and detraction. When I turn my eye inward, I find nothing but doubt and ignorance. All the world conspires to oppose and contradict me; tho' such is my weakness, that I feel all my opinions loosen and fall of themselves, when unsupported by the approbation of others. Every step I take is with hesitation, and every new reflection makes me dread an error and absurdity in my reasoning.
For with what confidence can I venture upon such bold enterprises, when beside those numberless infirmities peculiar to myself, I find so many which are common to human nature? Can I be sure, that in leaving all established opinions I am following truth; and by what criterion shall I distinguish her, even if fortune shou'd at last guide me on her foot-steps? After the most accurate and exact of my reasonings, I can give no reason why I shou'd assent to it; and feel nothing but a strong propensity to consider objects strongly in that view, under which they appear to me. Experience is a principle, which instructs me in the several conjunctions of objects for the past. Habit is another principle, which determines me to expect the same for the future; and both of them conspiring to operate upon the imagination, make me form certain ideas in a more intense and lively manner, than others, which are not attended with the same advantages. Without this quality, by which the mind enlivens some ideas beyond others (which seemingly is so trivial, and so little founded on reason) we cou'd never assent to any argument, nor carry our view beyond those few objects, which are present to our senses. Nay, even to these objects we cou'd never attribute any existence, but what was dependent on the senses; and must comprehend them entirely in that succession of perceptions, which constitutes our self or person. Nay farther, even with relation to that succession, we cou'd only admit of those perceptions, which are immediately present to our consciousness, nor cou'd those lively images, with which the memory presents us, be ever receiv'd as true pictures of past perceptions. The memory, senses, and understanding are, therefore, all of them founded on the imagination, or the vivacity of our ideas.

On Eagle's Wings, 1977, p. 159
As of a Trumpet, On Eagle's Wings

1977

The Cornerstone Speech (1861)
Context: But to return to the question of the future. What is to be the result of this revolution? Will every thing, commenced so well, continue as it has begun? In reply to this anxious inquiry, I can only say it all depends upon ourselves. A young man starting out in life on his majority, with health, talent, and ability, under a favoring Providence, may be said to be the architect of his own fortunes. His destinies are in his own hands. He may make for himself a name, of honor or dishonor, according to his own acts. If he plants himself upon truth, integrity, honor and uprightness, with industry, patience and energy, he cannot fail of success. So it is with us. We are a young republic, just entering upon the arena of nations; we will be the architects of our own fortunes. Our destiny, under Providence, is in our own hands. With wisdom, prudence, and statesmanship on the part of our public men, and intelligence, virtue and patriotism on the part of the people, success, to the full measures of our most sanguine hopes, may be looked for. But if unwise counsels prevail if we become divided if schisms arise if dissentions spring up if factions are engendered if party spirit, nourished by unholy personal ambition shall rear its hydra head, I have no good to prophesy for you. Without intelligence, virtue, integrity, and patriotism on the part of the people, no republic or representative government can be durable or stable.

Address to the people of Canada on the coronation of George VI (12 May 1937)

Thích Nhất Hạnh here quotes and interprets the "Ten Penetrations" of the Avatamsaka Sutra
The Sun My Heart (1996)
Context: The tenth penetration is, "All times penetrate one time. One time penetrates all times — past, present, and future. In one second, you can find the past, present, and future." In the past, you can see the present and the future. In the present, you can find the past and future. In the future, you can find the past and present. They "inter-contain" each other. Space contains time, time contains space. In the teaching of interpenetration, one determines the other, the other determines this one. When we realize our nature of interbeing, we will stop blaming and killing, because we know that we inter-are.

1960s, Emancipation Proclamation Centennial Address (1962)
Context: If our nation had done nothing more in its whole history than to create just two documents, its contribution to civilization would be imperishable. The first of these documents is the Declaration of Independence and the other is that which we are here to honor tonight, the Emancipation Proclamation. All tyrants, past, present and future, are powerless to bury the truths in these declarations, no matter how extensive their legions, how vast their power and how malignant their evil.

Source: Matter and Memory