You can cheat an honest man but not make a fool out of him.
A man who has committed a mistake and does not correct it is committing another mistake.
Because the newer methods of treatment are good, it does not follow that the old ones were bad: for if our honorable and worshipful ancestors had not recovered from their ailments, you and I would not be here today.
The vices come as passengers, visit us as guest and stay as masters.
The man of upright life is obeyed before he speaks.
The hardest thing of all is to find a black cat in a dark room, especially if there is no cat.