What an extraordinary change takes place . . . when for the first time the fact that everything depends upon how a thing is thought first enters the consciousness, when, in consequence, thought in its absoluteness replaces an apparent reality.

— Kierkegaard

When I was still doubtful as to his ability, I asked G. E. Moore for his opinion. Moore replied, “I think very well of him indeed.” When I enquired the reason for his opinion, he said that it was because Wittgenstein was the only man who looked puzzled at his lectures.

— Bertrand Russell

I can well understand why children love sand.

— Wittgenstein