As long as a word remains unspoken, you are its master; once you utter it, you are its slave.
Your secret is your prisoner; once you reveal it, you become its slave.
My friend is he who will tell me my faults in private.
The beginning of wisdom is to desire it.
Plan for this world as if you expect to live forever; but plan for the hereafter as if you expect to die tomorrow.
The test of good manners is to be patient with the bad ones.