Once a new idea springs into existence, it cannot be unthought. There is a sense of immortality in a new idea.

(...) being right all the time acquires a huge importance in education, and there is this terror of being wrong. The ego is so tied to being right that later on in life you are reluctant to accept that you are ever wrong, because you are defending not the idea but your self-esteem. (...) this terror of being wrong means that people have enormous difficulties in changing ideas.

Don't criticise a hypothesis, come up with a better one.

Creativity involves breaking out of established patterns in order to look at things in a different way.

Some people drift along like a cork on a river, feeling that they cannot do anything except drift, moment to moment. This is an attitude of mind. Everyone can be constructive even in tiny ways.

Most of the mistakes in thinking are inadequacies of perception rather than mistakes of logic.

Happiness is for those who don't really need it. So I can live without happiness.