Worrying about dying will hardly help you live.

To err is human; to forgive people and yourself for poor behavior is to be sensible and realistic.

There's no evidence whatsoever that men are more rational than women or that men are more willing to surrender their irrational beliefs. Both sexes seem to be equally irrational.

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

You never truly need what you want. That is the main and thoroughgoing key to serenity.

I had used eclectic therapy and behavior therapy on myself at the age of 19 to get over my fear of public speaking and of approaching young women in public.

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.