Nature knows no pause in progress and development, and attaches her curse on all inaction.
Habit is a man's sole comfort. We dislike doing without even unpleasant things to which we have become accustomed.
Night is the other half of life, and the better half.
Love is an ideal thing, marriage a real thing; a confusion of the real with the ideal never goes unpunished
Life is the childhood of our immortality.
Science and art belong to the whole world, and before them vanish the barriers of nationality.
He who is firm in will molds the world to himself.
Fresh activity is the only means of overcoming adversity.
To think is easy. To act is hard. But the hardest thing in the world is to act in accordance with your thinking.
The deepest, the only theme of human history, compared to which all others are of subordinate importance, is the conflict of skepticism with faith.
Patriotism ruins history.
Take care of your body with steadfast fidelity. The soul must see through these eyes alone, and if they are dim, the whole world is clouded.
A useless life is an early death.
Architecture is frozen music.
The world of empirical morality consists for the most part of nothing but ill will and envy.