We must be our own before we can be another's.

Before we acquire great power we must acquire wisdom to use it well.

Life is a succession of lessons which must be lived to be understood. All is riddle, and the key to a riddle is another riddle.

The man of genius inspires us with a boundless confidence in our own powers.

America is another name for opportunity.

Philosophically considered, the universe is composed of Nature and the Soul. Strictly speaking, therefore, all that is separate from us, all which Philosophy distinguishes as the 'Not Me,' that is, both nature and art, all other men and my own body, must be ranked under this name, 'Nature.'