What's done can't be undone.
Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.
You cannot truly listen to anyone and do anything else at the same time.
A mistake is always forgivable, rarely excusable and always unacceptable.
Men build too many walls and not enough bridges.
Generosity is giving more than you can, and pride is taking less than you need.
Almost every wise saying has an opposite one, no less wise, to balance it.
In order to change the world, you have to get your head together first
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
Nothing is as easy as it looks.
The future is uncertain but the end is always near.
A person reveals his character by nothing so clearly as the joke he resents.
He who is slowest in making a promise is most faithful in its performance.
Rational discussion is useful only when there is a significant base of shared assumptions.
The secret of life, though, is to fall seven times and to get up eight times.
You have heard that it was said, 'Eye for eye, and tooth for tooth.' But I tell you, do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also.
Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.
Appearances often are deceiving.
Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.
Whatever you think the world is withholding from you, you are withholding from the world.
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.