Banksy: Wall and Piece
Not a lot of words, but a lot of smart art in this one.
And there are some good quotes as well, like:

“Imagine a city where graffiti wasn't illegal, a city where everybody could draw whatever they liked. Where every street was awash with a million colours and little phrases. Where standing at a bus stop was never boring. A city that felt like a party where everyone was invited, not just the estate agents and barons of big business. Imagine a city like that and stop leaning against the wall - it's wet.”

and

"Any advertisement in public space that gives you no choice whether you see it or not is yours. It belongs to you. It's yours to take, rearrange and re-use. Asking for permission is like asking to keep a rock someone just threw at your head."

Somehow made me take a closer look at street art in my city and also woke up the urge to create.