Philosophy is the true mother of science.
Promises are not to be kept, if the keeping of them is to prove harmful to those to whom you have made them.
For my own part, I had rather be old only a short time than be old before I really am so.
That last day does not bring extinction to us, but change of place.
Any man is liable to err, only a fool persists in error.
He who has once deviated from the truth, usually commits perjury with as little scruple as he would tell a lie.