The highest realms of thought are impossible to reach without first attaining an understanding of compassion.
The more I know, the more I know that I don't know.
Wisdom is knowing how little we know.
In all of us, even in good men, there is a lawless wild-beast nature, which peers out in sleep.
I know nothing except the fact of my ignorance.
Remember, no human condition is ever permanent. Then you will not be overjoyed in good fortune nor too scornful in misfortune.