To be uncertain is to be uncomfortable, but to be certain is to be ridiculous.
Man must rise above the Earth - to the top of the atmosphere and beyond - for only thus will he fully understand the world in which he lives.
Living well and beautifully and justly are all one thing.
Every action has its pleasures and its price.
The warm love has the coldest end.
He who is not contented with what he has, would not be contented with what he would like to have.