„Every man of learning wishes, that his son may be learned; and that not so much from a view to pecuniary advantage, as from a desire to have him supplied with the means of useful instruction and liberal amusement.“

„Failure is instructive. The person who really thinks learns quite as much from his failures as from his successes.“

—  John Dewey American philosopher, psychologist, and educational reformer 1859 - 1952

„You must learn to use each man to his best advantage“

—  David Gemmell, book Quest for Lost Heroes

Source: Drenai series, Quest for Lost Heroes, Ch. 1
Context: Why must I have the Piglet?' 'Because you are the best.' 'I do not understand.' 'Teach him.' 'And who teaches me?' ' As an officer, my lord, you will have many men under your command and not all will be gifted. You must learn to use each man to his best advantage...

„I wish as sincerely as any man, that learned men may have all the encouragements, and all the advantages that are consistent with the general right and good of mankind.“

—  Joseph Yates (judge) English barrister and judge 1722 - 1770

4 Burr. Part IV., 2394.
Dissenting in Millar v Taylor (1769)

„I have never met a man so ignorant that I could not learn something from him.“

—  Galileo Galilei Italian mathematician, physicist, philosopher and astronomer 1564 - 1642

As quoted in The Story of Civilization : The Age of Reason Begins, 1558-1648 (1935) by Will Durant, p. 605
Attributed

„You have so much to learn from your enemies.“

—  Eckhart Tolle German writer 1948

Source: A New Earth: Awakening to Your Life's Purpose

„Their attitude to Marx, as the leading critic of capitalism, is therefore much less cocksure than it used to be. In my belief, they have much to learn from him.“

—  Joan Robinson, book An Essay on Marxian Economics

Foreword, p. xxii
An Essay on Marxian Economics (Second Edition) (1966)
Context: Until recently, Marx used to be treated in academic circles with contemptuous silence, broken only by an occasional mocking footnote. But modern developments in academic theory, forced by modern developments in economic life — the analysis of monopoly and the analysis of unemployment — have shattered the structure of orthodox doctrine and destroyed the complacency with which economists were wont to view the working of laissez-faire capitalism. Their attitude to Marx, as the leading critic of capitalism, is therefore much less cocksure than it used to be. In my belief, they have much to learn from him.

„Learn fortitude and toil from me, my son,
Ache of true toil. Good fortune learn from others.“

—  Virgil, Aeneid

Original: (la) Disce, puer, virtutem ex me verumque laborem,
Fortunam ex aliis.
Source: Aeneid (29–19 BC), Book XII, Lines 435–436 (tr. Robert Fitzgerald)

„True instruction is this: —to learn to wish that each thing should come to pass as it does.“

—  Epictetus philosopher from Ancient Greece 50 - 138

Context: True instruction is this: —to learn to wish that each thing should come to pass as it does. And how does it come to pass? As the Disposer has disposed it. Now He has disposed that there should be summer and winter, and plenty and dearth, and vice and virtue, and all such opposites, for the harmony of the whole. (26).

„It is natural for a man's character and actions to be influenced by his friends and associates and for him to follow the local norms of behavior. Therefore, he should associate with the righteous and be constantly in the company of the wise, so as to learn from their deeds. Conversely, he should keep away from the wicked who walk in darkness, so as not to learn from their deeds.“

—  Maimónides rabbi, physician, philosopher 1138 - 1204

Source: Hilkhot De'ot (Laws Concerning Character Traits), Chapter 6, Section 1

„A man's character may be learned from the adjectives which he habitually uses in conversation.“

—  Mark Twain American author and humorist 1835 - 1910

„The applications of science have built man a well-supplied house, and are teaching him to live healthily therein. They have enabled him to throw masses of people against another with cruel weapons. They may yet allow him truly to encompass the great record and to grow in the wisdom of race experience. He may perish in conflict before he learns to wield that record for his true good. Yet, in the application of science to the needs and desires of man, it would seem to be a singularly unfortunate stage at which to terminate the process, or to lose hope as to the outcome.“

—  Vannevar Bush, book As We May Think

As We May Think (1945)

„Because we have learned that our parents and other people cannot accept our emotions, thoughts and desires and we cannot tolerate them in that situation, we learn to disconnect from our personal truth as well. This includes disconnecting from our feelings so we don't feel them. This includes disconnecting from our thoughts so we aren't thinking them. It means disconnecting from our bodies so we don't feel our bodies and it involves disconnecting from our personal desires.“

—  Teal Swan American spiritual teacher 1984

„Let them have what instructions you will, and ever so learned lectures“

—  John Locke, book Some Thoughts Concerning Education

Sec. 67
Some Thoughts Concerning Education (1693)
Context: Let them have what instructions you will, and ever so learned lectures of breeding daily inculcated into them, that which will most influence their carriage will be the company they converse with, and the fashion of those about them.

„Epops: A man may learn wisdom even from a foe.“

—  Aristophanés, The Birds

tr. in Goldstein-Jackson 1983, p. 163 http://books.google.com/books?q=isbn%3A9780389203933+%22A+man+may+learn+wisdom+even+from+a+foe%22+Aristophanes
Birds, line 375-382 (our emphasis on 375 and 378-379 and 382)
Compare the later: "We can learn even from our enemies", Ovid, Metamorphoses, IV, 428.
Birds (414 BC)

„When you wish to instruct, be brief; that men’s minds may take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.“

—  Horace, Ars Poetica

Original: (la) Quidquid praecipies, esto brevis, ut cito dicta
percipiant animi dociles teneantque fideles:
omne supervacuum pleno de pectore manat.
Source: Ars Poetica, or The Epistle to the Pisones (c. 18 BC), Lines 335–337; Edward Charles Wickham translation

„Mulla, Mulla, my son has written from the Abode of Learning to say that he has completely finished his studies!“

—  Nasreddin philosopher, Sufi and wise man from Turkey, remembered for his funny stories and anecdotes 1208 - 1284

"Console yourself, madam, with the thought that God will no doubt send him more."
Idries Shah, The Subtleties of the Inimitable Mulla Nasrudin (1973), ISBN 0525473548, p. 134

„Whenever we proceed from the known into the unknown we may hope to understand, but we may have to learn at the same time a new meaning of the word "understanding."“

—  Werner Heisenberg German theoretical physicist 1901 - 1976

Physics and Philosophy (1958)
Source: Physics and Philosophy: The Revolution in Modern Science
Context: Whenever we proceed from the known into the unknown we may hope to understand, but we may have to learn at the same time a new meaning of the word "understanding."

„It is not a reproach but a compliment to learning, to say, that great scholars are less fit for business; since the truth is, business is so much a lower thing than learning, that a man used to the last cannot easily bring his stomach down to the first.“

—  George Savile, 1st Marquess of Halifax English politician 1633 - 1695

Political, Moral, and Miscellaneous Reflections (1750), Moral Thoughts and Reflections

„It's said that a wise person learns from his mistakes. A wiser one learns from others' mistakes. But the wisest person of all learns from others's successes.“

—  John C. Maxwell American author, speaker and pastor 1947

Source: Leadership Gold: Lessons I've Learned from a Lifetime of Leading