To be uncertain is to be uncomfortable, but to be certain is to be ridiculous.
If you can do only a little. Do what you can. What you cannot enforce, do not command.
Remember, no human condition is ever permanent. Then you will not be overjoyed in good fortune nor too scornful in misfortune.
An unexamined life is a life of no account.
Regard your good name as the richest jewel yoou can possibly be possessed of.
The rest of the world lives to eat, while I eat to live.