Fear is a reaction. Courage is a decision.
You are what you think.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change, that lives within the means available and works co-operatively against common threats.
They say a little knowledge is a dangerous thing, but it’s not one half so bad as a lot of ignorance.
I can normally tell how intelligent a man is by how stupid he thinks I am.
The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time.
I am too intelligent, too demanding, and too resourceful for anyone to be able to take charge of me entirely. No one knows me or loves me completely. I have only myself.
I think, therefore I am.
There are two ways to be fooled. One is to believe what isn’t true; the other is to refuse to believe what is true.
Routine, in an intelligent man, is a sign of ambition.
Why should I fear death? If I am, death is not. If death is, I am not. Why should I fear that which can only exist when I do not?
I’m sure the universe is full of intelligent life. It’s just been too intelligent to come here.
Ideas are bulletproof.
My pain may be the reason for somebody’s laugh. But my laugh must never be the reason for somebody’s pain.
We are our choices.
Man is condemned to be free; because once thrown into the world, he is responsible for everything he does.
Prevention is better than cure.
You need to surround yourself with quality human beings that are intelligent and have a vision.
Be better today than you were yesterday, and be better tomorrow than you are today.
The best revenge is to improve yourself.