There are two classes of men called poets. The one cultivates life, the other art,... one satisfies hunger, the other gratifies the palate.

The universe is wider than our views of it.

Truth strikes us from behind and in the dark, as well as from before and in broad daylight.

I come to my solitary woodland walk as the homesick go home. I thus dispose of the superfluous and see things as they are, grand and beautiful.

The other side of the globe is but the home of our correspondent. Our voyaging is only great-circle sailing.

The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one. Mathematics should be mixed not only with physics but with ethics; that is mixed mathematics.

The book has never been written which is to be accepted without any allowance.