Everything that irritates us about others can lead us to an understanding of ourselves.
There is no marvel in a woman learning to speak, but there would be in teaching her to hold her tongue.
Stupid men are often capable of things the clever would not dare to contemplate...
Progress of mankind is progress of mind and intellect.
I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.
A desire to be observed, considered, esteemed, praised, beloved, and admired by his fellows is one of the earliest as well as the keenest dispositions discovered in the heart of man.
Each man is questioned by life; and he can only answer to life by answering for his own life; to life he can only respond by being responsible.
I can calculate the motion of heavenly bodies but not the madness of people.
All of humanity's problems stem from man's inability to sit quietly in a room alone.
Sometimes our light goes out, but is blown again into instant flame by an encounter with another human being.
When people are protecting something truly special to them, they truly can become...as strong as they can be.
Outstanding people have one thing in common: an absolute sense of mission
In spite of everything, I still believe that people are really good at heart.
Human history becomes more and more a race between education and catastrophe.
Man is made or unmade by himself. By the right choice he ascends. As a being of power, intelligence, and love, and the lord of his own thoughts, he holds the key to every situation.
A man's first care should be to avoid the reproaches of his own heart.
Human nature is not totally fixed, but on any realistic scale, evolutionary processes are much too slow to affect it.
All is in the hands of man. Therefore wash them often.
A man's feet should be planted in his country, but his eyes should survey the world.
Great men are like eagles, and build their nest on some lofty solitude.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.