Never esteem anything as of advantage to you that will make you break your word or lose your self-respect.
People will buy anything that is one to a customer.
Never be a cynic, even a gentle one. Never help out a sneer, even at the devil.
You can't separate peace from freedom because no one can be at peace unless he has his freedom.
The brain is a wonderful organ. It starts working the moment you get up in the morning and does not stop until you get into the office.
Never let the demands of tomorrow interfere with the pleasures and excitement of today.
After all it is those who have a deep and real inner life who are best able to deal with the irritating details of outer life.