“Should ever a physician be born with the genius of Locke, I am persuaded that he might trace all bodily and mental derangements to our unnatural habits, as clearly as that philosopher has traced all knowledge to sensation.”

posthumous quotes, The Shop-Talk of Edgar Degas', (1961)

Conjectures and Refutations: The Growth of Scientific Knowledge (1963)

Letter 2
Letters Written in Sweden (1796)
Context: The more I see of the world, the more I am convinced that civilisation is a blessing not sufficiently estimated by those who have not traced its progress; for it not only refines our enjoyments, but produces a variety which enables us to retain the primitive delicacy of our sensations. Without the aid of the imagination all the pleasures of the senses must sink into grossness, unless continual novelty serve as a substitute for the imagination, which, being impossible, it was to this weariness, I suppose, that Solomon alluded when he declared that there was nothing new under the sun!

Un poète doit laisser des traces de son passage, non des preuves. Seules les traces font rêver.
As quoted in The French-American Review (1976) by Texas Christian University, p. 132
Variant translation: A poet must leave traces of his passage, not proofs. Only traces bring about dreams.
As quoted in Popular Dissent, Human Agency, and Global Politics (2000) by Roland Bleiker, p. 50

Pupils at Sais (1799)
Context: Not wise does it seem to attempt comprehending and understanding a Human World without full perfected Humanity. No talent must sleep; and if all are not alike active, all must be alert, and not oppressed and enervated. As we see a future Painter in the boy who fills every wall with sketches and variedly adds colour to figure; so we see a future Philosopher in him who restlessly traces and questions all natural things, pays heed to all, brings together whatever is remarkable, and rejoices when he has become master and possessor of a new phenomenon, of a new power and piece of knowledge.

Hymn: The Burial of Moses http://www.bethanyipc.org.sg/poems/bulletin080113.htm

J. C. Ward, Memoirs of a Theoretical Physicist (Optics Journal, Rochester, 2004).

Autobiography (1936; 1949; 1958)

Source: Letter to his daughter (1978), p. 15
Context: You cannot be big unless you are prepared to kiss the ground. You cannot defend the soil unless you know the smell of that soil. I know the smell of our soil. I know the rhythm of our rivers. I know the beat of our drums. The theories, the dogmas and the scripts stand outside the gates of history. The dominant factor is the aspiration of the people and the ability to seek total identification with it. Once the significance of the symphony is grasped, the lines fall into place, the dogmas and theories get legs to move in time to the majesty of that music. This does not mean that I am preaching pragmatism. There is a lot of expediency in pragmatism. I am trying to trace the roots of the problems, the genesis of the challenges, the cause of the struggle.