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.

The whole universe is contained within a single human being – you.

In spite of everything, I still believe that people are really good at heart.

Progress of mankind is progress of mind and intellect.

Though I love my country, I do not love my countrymen.

Every form of addiction is bad, no matter whether the narcotic be alcohol, morphine or idealism.

It is no measure of health to be well adjusted to a profoundly sick society.

I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.

In many people it is already an impertinence to say 'I'.

Sometimes our light goes out, but is blown again into instant flame by an encounter with another human being.

All of humanity's problems stem from man's inability to sit quietly in a room alone.

Human history is in essence a history of ideas.

Human nature is not totally fixed, but on any realistic scale, evolutionary processes are much too slow to affect it.

There are four million different kinds of animals and plants in the world. That’s four million solutions to the problem of staying alive.

To live alone is the fate of all great souls.

How can you thank a man for giving you what's already yours? How then can you thank him for giving you only part of what is yours?

People seldom do what they believe in. They do what is convenient, then repent.

There is no marvel in a woman learning to speak, but there would be in teaching her to hold her tongue.

Every man takes the limits of his own field of vision for the limits of the world.

People who know little are usually great talkers, while men who know much say little.

Sickness is mankind's greatest defect.