No employment can be managed without arithmetic, no mechanical invention without geometry.
The best tranquilizer is a clear conscience.
Genius without education is like silver in the mine.
Sloth and Silence are a Fool's Virtues
It is a grand mistake to think of being great without goodness and I pronounce it as certain that there was never a truly great man that was not at the same time truly virtuous.
Be cheerful -- the problems that worry us most are those that never arrive.