Love has as few problems as a motor car. The only problems are the driver, the passengers, and the road.

True undoubting is the teacher's part, continual undoubting the part of the pupil.

The indestructible is one: it is each individual human being and, at the same time, it is common to all, hence the incomparably indivisible union that exists between human beings.

Evil is whatever distracts.

The notion of the infinite expanse and copiousness of the cosmos is the result of the mixture, carried to the extreme limit, of laborious creation and free self-determination.

What I write is different from what I say, what I say is different from what I think, what I think is different from what I ought to think and so it goes further into the deepest darkness.

Test yourself on mankind. It is something that makes the doubter doubt, the believer believe.