By honestly acknowledging your past errors, but never damning yourself for them, you can learn to use your past for your own future benefit.

Worrying about dying will hardly help you live.

By not caring too much about what people think, I'm able to think for myself and propagate ideas which are very often unpopular. And I succeed with them because, again, I don't care too much what other people think.

When I was 16 I started keeping a diary in which I recorded my disagreements with the famous philosophers. I didn't insist that they were wrong, that I was right and I had to prevail. I just agreed and disagreed with them. I thought there was a high degree of probability that I was right and some other thinkers were wrong. But I wasn't positive about it.

You largely constructed your depression. It wasn't given to you. Therefore, you can deconstruct it.

As a result of my philosophy, I wasn't even upset about Hitler. I was willing to go to war to knock him off, but I didn't hate him. I hated what he was doing.

Failure doesn't have anything to do with your intrinsic value as a person.