Do not laugh much or often or unrestrainedly.
Freedom is the only worthy goal in life. It is won by disregarding things that lie beyond our control. Stop aspiring to be anyone other than your own best self: for that does fall within your control.
No man is able to make progress when he is wavering between opposite things.
Men are not afraid of things, but of how they view them.
Don't regard what anyone says of you, for this, after all, is no concern of yours.
Be careful whom you associate with. It is human to imitate the habits of those with whom we interact. We inadvertently adopt their interests, their opinions, their values, and their habit of interpreting events.