I do not think any reasonable person can doubt that in India, China and Japan, if the knowledge of birth control existed, the birthrate would fall very rapidly

The good life is one inspired by love and guided by knowledge.

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

The time you enjoy wasting is not wasted time.

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

Men are born ignorant, not stupid. They are made stupid by education.

An Honest politician will not be tolerated by a democracy unless he is very stupid ... because only a very stupid man can honestly share the prejudices of more than half the nation.

If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

We have in fact, two kinds of morality, side by side: one which we preach, but do not practice, and another which we practice, but seldom preach.

The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.

Cruel men believe in a cruel god and use their belief to excuse their cruelty. Only kindly men believe in a kindly god, and they would be kindly in any case.

A brother is like gold and a friend is like diamond. If gold cracks you can melt it and make it just like it was before. If a diamond cracks, it can never be like it was before.

When you walk a life of honesty, you live a life of truth.

It's ridiculous to think that taking out words will heal hearts, because a palm-sized box is just not enough for the anger of this world.

The true end of tragedy is to purify the passions.

Advice is like a doctor's pills; how easily he gives them! how reluctantly he takes them when his turn comes!

What you feel, what you desire and what you want is not what you are. You are a consciousness. Speak consciously and speak what your consciousness allows you to speak.

The easiest time to cure an illness is before it is accepted as a part of the self-image.

I was very, very fortunate. I knew that. I've always known that.

In fact, you don’t have a soul, you are your own soul. In other words, you are not this book, your social security card, your body or your mind. You are you.