At this time of year it's easy to forget the true meaning of Christianity - the lies, the corruption, the abuse.

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.

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.

Become good at cheating and you never need to become good at anything else.

If you want someone to be ignored then build a life-size bronze statue of them and stick it in the middle of town. It doesn't matter how great you were, it'll always take an unfunny drunk with climbing skills to make people notice you.

I don't know if street art ever really works indoors. If you domesticate an animal, it goes from being wild and free to sterile, fat and sleepy. So maybe the art should stay outside.

You live in the city and all the time there are signs telling you what to do and billboards trying to sell you something.