Whatever torch we kindle, and whatever space it may illuminate, our horizon will always remain encircled by the depth of night.

Of all the intellectual faculties, judgment is the last to mature. A child under the age of fifteen should confine its attention either to subjects like mathematics, in which errors of judgment are impossible, or to subjects in which they are not very dangerous, like languages, natural science, history, etc.

Thus, the task is not so much to see what no one yet has seen, but to think what nobody yet has thought about that which everybody sees.

A man can surely do what he wills to do, but cannot determine what he wills.

The heavy armor becomes the light dress of childhood; the pain is brief, the joy unending.

If you want to know your true opinion of someone, watch the effect produced in you by the first sight of a letter from him.

Money is human happiness in the abstract.