Beware of dissipating your powers; strive constantly to concentrate them.

Our earthly ball a peopled garden.

Enjoy what you can, endure what you must.

Chess is the touchstone of intellect.

Thinking is easy, acting is difficult, and to put one's thoughts into action is the most difficult thing in the world.

Whether one show one's self a man of genius in science or compose a song, the only point is, whether the thought, the discovery, the deed, is living and can live on.

The absence of temptation is the absence of virtue.