I think, therefore I am.
Choose rather to be strong of soul than strong of body.
Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.
Drop the idea that you are Atlas carrying the world on your shoulders. The world would go on even without you. Don't take yourself so seriously.
Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.
Judge a man by his questions rather than by his answers.
Men build too many walls and not enough bridges.
Do not deny the classical approach, simply as a reaction, or you will have created another pattern and trapped yourself there.
I hear and I forget. I see and I remember. I do and I understand.
Without courage, wisdom bears no fruit.
The only limit to our realization of tomorrow will be our doubts of today.
Stupidity is a talent for misconception.
The noblest pleasure is the joy of understanding.
If you don't stand for something you will fall for anything.
Happiness is not an ideal of reason, but of imagination.
Rational discussion is useful only when there is a significant base of shared assumptions.
If we do not lay out ourselves in the service of mankind whom should we serve?
Science is organized knowledge. Wisdom is organized life.
What a liberation to realize that the “voice in my head” is not who I am. Who am I then? The one who sees that.
I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.
It is better to be looked over than overlooked.