The pride of youth is in strength and beauty, the pride of old age is in discretion.

It is godlike ever to think on something beautiful and on something new.

It is greed to do all the talking but not to want to listen at all.

I would rather discover one true cause than gain the kingdom of Persia.

By convention sweet and by convention bitter, by convention hot, by convention cold, by convention color; but in reality atoms and void.

Raising children is an uncertain thing; success is reached only after a life of battle and worry.