He who wishes to be rich within a day, will be hanged within a year.

Where there is shouting, there is no true knowledge.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

The depth and strength of a human character are defined by its moral reserves. People reveal themselves completely only when they are thrown out of the customary conditions of their life, for only then do they have to fall back on their reserves.

As a well-spent day brings happy sleep, so a life well used brings happy death.

Simplicity is the ultimate sophistication.