God isn't compatible with machinery and scientific medicine and universal happiness. You must make your choice. Our civilization has chosen machinery and medicine and happiness.

The only way to find true happiness is to risk being completely cut open.

There is no greater sorrow than to recall happiness in times of misery.

The essence of philosophy is that a man should so live that his happiness shall depend as little as possible on external things.

Happiness is beneficial for the body, but it is grief that develops the powers of the mind.