If you talk to a man in a language he understands, that goes to his head. If you talk to him in his language, that goes to his heart.
The world would be happier if men had the same capacity to be silent that they have to speak.
There is no come back to caves. We are too many.
If money help a man to do good to others, it is of some value; but if not, it is simply a mass of evil, and the sooner it is got rid of, the better.
I can calculate the motion of heavenly bodies but not the madness of people.
Sickness is mankind's greatest defect.
We have to heal our wounded world. The chaos, despair, and senseless destruction we see today are a result of the alienation that people feel from each other and their environment.
The greatest attitude of all is gratitude.
Treat people as if they were what they ought to be, and you help them to become what they are capable of being.
When people are protecting something truly special to them, they truly can become...as strong as they can be.
Humanity is acquiring all the right technology for all the wrong reasons.
Man has the power to act as his own destroyer - and that is the way he has acted through most of his history.
A man is great by deeds, not by birth.
Johnny Cash has always been larger than life.
I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.
Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life.
A wise man can play the part of a clown, but a clown can't play the part of a wise man.
I like university professors, but you know, we shouldn't hold them up as the high-water mark of all human achievement. They're just a form of life, another form of life.
The first time someone shows you who they are, believe them.
I just invent, then wait until man comes around to needing what I've invented.
The true measure of a man is how he treats someone who can do him absolutely no good.