Human history is in essence a history of ideas.
A musician must make music, an artist must paint, a poet must write, if he is to be ultimately at peace with himself. What a man can be, he must be
One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.
Challenging the meaning of life is the truest expression of the state of being human.
Everything that irritates us about others can lead us to an understanding of ourselves.
Stupid men are often capable of things the clever would not dare to contemplate...
Sickness is mankind's greatest defect.
All of humanity's problems stem from man's inability to sit quietly in a room alone.
People demand freedom of speech as a compensation for the freedom of thought which they seldom use.
I can calculate the motion of heavenly bodies but not the madness of people.
The greatest attitude of all is gratitude.
No mortal can keep a secret. If the lips are silent, he chatters with his fingertips; betrayal oozes out of him at every pore.
It is no measure of health to be well adjusted to a profoundly sick society.
He who makes a beast of himself gets rid of the pain of being a man.
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.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
We may have different religions, different languages, different colored skin, but we all belong to one human race.
If you want to know what a man's like, take a good look at how he treats his inferiors, not his equals.
That man is the noblest creature may also be inferred from the fact that no other creature has yet contested this claim.
Our true nationality is mankind.
Anyone who says he can see through women is missing a lot.