“The acts of the mind, wherein it exerts its power over simple ideas, are chiefly these three: 1. Combining several simple ideas into one compound one, and thus all complex ideas are made. 2. The second is bringing two ideas, whether simple or complex, together, and setting them by one another so as to take a view of them at once, without uniting them into one, by which it gets all its ideas of relations. 3. The third is separating them from all other ideas that accompany them in their real existence: this is called abstraction, and thus all its general ideas are made.”

“One entered the world, Denis pursued, having ready-made ideas about everything. One had a philosophy and tried to make life fit into it. One should have lived first and then made one's philosophy to fit life...Life, facts, things were horribly complicated; ideas, even the most difficult of them, deceptively simple. In the world of ideas, everything was clear; in life all was obscure, embroiled. Was it surprising that one was miserable, horribly unhappy?”

“Every revolutionary idea seems to evoke three stages of reaction. They may be summed up by the phrases: (1) It's completely impossible. (2) It's possible, but it's not worth doing. (3) I said it was a good idea all along.”

“If you happen to read fairy tales, you will observe that one idea runs from one end of them to the other--the idea that peace and happiness can only exist on some condition. This idea, which is the core of ethics, is the core of the nursery-tales.”

“Bring ideas in and entertain them royally, for one of them may be the king.”

“To hold in the mind forever two ideas which seemed to be in opposition. The first . . . acceptance totally without rancor, of life as it is, and men as they are [;] . . . the second . . . that one must never, in one's life, accept . . . injustices as commonplace but must fight them with all one's strength.”