Keep not standing fixed and rooted. Briskly venture, briskly roam.

The credit of advancing science has always been due to individuals and never to the age.

Master and Doctor are my titles; for ten years now, without repose, I held my erudite recitals and led my pupils by the nose.

Our virtues and view spring from one root.

The spirit from which we act is the principal matter.

How often do I lull my seething blood to rest, for you have never seen anything so unsteady, so uncertain, as this heart.

Giving is the business of the rich.