True knowledge exists in knowing that you know nothing.
By all implies marry if you get a great wife/husband, you are going to be pleased. If you get a bad a single, you are going to become a philosopher.
Wisdom is knowing what you don't know.
No man has a right to be an amateur in the matter of physical training
The difficulty, my friends, is not in avoiding death, but in avoiding unrighteousness; for that runs faster than death.
To know, is to know that you know nothing.