One of the greatest pains to human nature is the pain of a new idea.

The secret of success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you're in control of your life. If you don't, life controls you.

Oh! poverty is a weary thing, 'tis full of grief and pain; it keepeth down the soul of man, as with an iron chain.

We must all suffer from one of two pains: the pain of discipline or the pain of regret. The difference is discipline weighs ounces while regret weighs tons.

My pain may be the reason for somebody’s laugh. But my laugh must never be the reason for somebody’s pain.

Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside and something else will take its place. If I quit, however, it lasts forever.

The wise man accepts his pain, endures it, but does not add to it.

If you feel pain, you're alive. If you feel other people's pain, you're a human being.

Pain is certain, suffering is optional.

There is no coming to consciousness without pain.

The growth of the mind is the widening of the range of consciousness, and . . . each step forward has been a most painful and laborious achievement.

If everyone is thinking alike, then somebody isn't thinking.

New opinions are always suspected, and usually opposed, without any other reason but because they are not already common.

I am quite sure now that often, very often, in matters concerning religion and politics a man's reasoning powers are not above the monkey's.

Some of the worst things in my life never happened.

Emotions are inherent in your nature, but their content is dictated by your mind.

To make a contented slave it is necessary to make a thoughtless one. It is necessary to darken the moral and mental vision and, as far as possible, to annihilate the power of reason.