“There is, so I believe, in the essence of everything, something that we cannot call learning. There is, my friend, only a knowledge — that is everywhere, that is Atman, that is in me and you and in every creature, and I am beginning to believe that this knowledge has no worse enemy than the man of knowledge, than learning.”

Source: The Power-House (1916), Ch. 3 "Tells of a Midsummer Night"

Source: Guide for the Perplexed (c. 1190), Part III, Ch.21
Context: He fully knows His unchangeable essence, and has thus a knowledge of all that results from any of His acts. If we were to try to understand in what manner this is done, it would be the same as if we tried to be the same as God, and to make our knowledge identical with His knowledge. Those who seek the truth, and admit what is true, must believe that nothing is hidden from God; that everything is revealed to His knowledge, which is identical with His essence; that this kind of knowledge cannot be comprehended by us; for if we knew its method, we would possess that intellect by which such knowledge could be acquired.... Note this well, for I think that this is an excellent idea, and leads to correct views; no error will be found in it; no dialectical argument; it does not lead to any absurd conclusion, nor to ascribing any defect to God. These sublime and profound themes admit of no proof whatever... In all questions that cannot be demonstrated, we must adopt the method which we have adopted in this question about God's Omniscience. Note it.

Dog Star, p. 786
2000s and posthumous publications, The Collected Stories of Arthur C. Clarke (2001)

Speech in Springfield Illinois (24 October 1952)
Context: I do not believe it is man's destiny to compress this once boundless earth into a small neighborhood, the better to destroy it. Nor do I believe it is in the nature of man to strike eternally at the image of himself, and therefore of God. I profoundly believe that there is on this horizon, as yet only dimly perceived, a new dawn of conscience. In that purer light, people will come to see themselves in each other, which is to say they will make themselves known to one another by their similarities rather than by their differences. Man's knowledge of things will begin to be matched by man's knowledge of self. The significance of a smaller world will be measured not in terms of military advantage, but in terms of advantage for the human community. It will be the triumph of the heartbeat over the drumbeat.
These are my beliefs and I hold them deeply, but they would be without any inner meaning for me unless I felt that they were also the deep beliefs of human beings everywhere. And the proof of this, to my mind, is the very existence of the United Nations.

Pearls of Wisdom

"Credo" at his official website http://robertfulghum.com/index.php/fulghumweb/credo/; this may be partly influenced by remarks of Albert Einstein in "What Life Means to Einstein: An Interview by George Sylvester Viereck" The Saturday Evening Post (26 October 1929): I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Source: All I Really Need to Know I Learned in Kindergarten

Part 1: "From Rockaway to MIT", "Who Stole the Door?", p. 36-37
Surely You're Joking, Mr. Feynman! (1985)

Maxim no .1.
The Maxims of Ptahhotep (c. 2350 BCE)
Context: Do not be arrogant because of your knowledge, but confer with the ignorant man as with the learned. For knowledge has no limits, and none has yet achieved perfection in it. Good speech is more hidden than malachite, yet it is found in the possession of women slaves at the millstones.

Comparing his dueling days with commando tactics, as quoted in Skorzeny (1972) by Charles Whiting, p. 17.
Context: My knowledge of pain, learned with the sabre, taught me not to be afraid. And just as in dueling when you must concentrate on your enemy's cheek, so, too, in war. You cannot waste time on feinting and sidestepping. You must decide on your target and go in.