While watching him work on the set of the film based on my life - Patch Adams - I saw that whenever there was a stressful moment, Robin would tap into his improvisation style to lighten the mood of cast and crew.

Robin Williams was a wonderful, kind, and generous man. One important thing I remember about his personality is that he was unassuming - he never acted as if he was powerful or famous.

What I really want is a world where no one alive can remember what the word ‘war’ means. That’s my goal.

Unlike a lot of people, I don’t feel powerless. I know I can do something. But anyone can do something, it’s not about being special. It’s about deciding to do it – to dive into work for peace and justice and care for everybody on the planet.

The Gesundheit Institute is a pie in the face of greed – by taking the most expensive thing in America, health care, and giving it away for free.

I’m a raging leftist political activist. I’ve never had a spiritual thought in my life related to God. I’m clear that that’s a human invention.

I’m great at a deathbed. I’ve never given tranquillisers or psychiatric medicine. I’ve given love and fun and creativity and passion and hope, and these things ease suffering.

It’s such a paradox for them to say, “Oh, my God, I’ve thrown away my life,” and continue to do that for the last month of their life. I shake them, physically shake them, and say, “What about now? What about now?”

I’ve never made a penny being a doctor, so that makes it not a job. My sense of a doctor is that one is a presence caring for health. So I’m never not a doctor. People call me from all over the world who are hurting, and I care for them. Chatting is what more people want than anything.

Please live a healthy life – medicine is an imperfect science.