To go forward you have to leave something behind.

It takes time to get rid of all this garbage that I've been carrying around that was influencing the way I thought and the way I lived. It had a lot to do with Yoko showing me that I was still possessed. I left physically when I fell in love with Yoko, but mentally it took the last ten years of struggling. I learned everything from her. ... It is a teacher-pupil relationship.

Discontent is the first necessity of progress.

It is better to point out your own mistakes than have somebody else do it.

People are not remembered by how few times they fail, but by how often they succeed. Every wrong step is another step forward.

I never view mistakes as failures. They are simply opportunities to find out what doesn't work.