Prize that which is best in the universe; and this is that which useth everything and ordereth everything.
The happiness of your life depends upon the quality of your thoughts.
You have to assemble your life yourself - action by action.
Understand however that every man is worth just so much as the things are worth about which he busies himself.
A rational nature admits of nothing but what is serviceable to the rest of mankind.
It is not death that a man should fear, but he should fear never beginning to live.