Man is a tool-making animal
There's many witty men whose brains can't fill their bellies.
Pay what you owe and you'll know what's your own.
Having been poor is no shame, but being ashamed of it, is.
He that has done you a kindness will be more ready to do you another, than he whom you yourself have obliged.
Virtue alone is sufficient to make a man great, glorious, and happy.