We don’t need any more heroes; we just need someone to take out the recycling.

If you are dirty, insignificant and unloved then rats are the ultimate role model.

I wanted to highlight the destruction in Gaza by posting photos on my website - but on the internet, people only look at pictures of kittens.

I’ve learnt from experience that a painting isn’t finished when you put down your brush – that’s when it starts. The public reaction is what supplies meaning and value. Art comes alive in the arguments you have about it.

I give away thousands of paintings for free.

As far as I can tell the only thing worth looking at in most museums of art is all the schoolgirls on daytrips with the art departments.

It's impossible to predict which paintings will last and which won't. In New Orleans I painted on a dilapidated shop in a street littered with abandoned cars and rotting mattresses, then two hours later the piece was gone. It turned out I'd picked the side of a crack house and the proprietor didn't like the attention.