Two souls dwell, alas! in my breast.

Sowing is not as difficult as reaping.

He who enjoys doing and enjoys what he has done is happy.

When the healthy nature of man acts as a whole, when he feels himself to be in the world as in a great, beautiful, noble, and valued whole, when harmonious ease affords him a pure and free delight, then the universe, if it could experience itself, would exult, as having attained its goal, and admire the climax of its own becoming and essence.

There are people who pay attention to the weaknesses of their friends; that is to no avail. I have always closely watched and profited from the strengths of my adversaries.

People who think honestly and deeply have a hostile attitude towards the public.

Science and art belong to the whole world, and before them vanish the barriers of nationality.