If you are in front of a wall that you cannot get past, would you just keep banging your head into the wall?... No, you would find a new wall.

Without training you will not grow wings.

So if you do acrobatics things on the street with no other goal than showing off, please don't say it's parkour. Acrobatics existed long time ago before parkour.

A good Traceur trains until he/she gets it right. An excellent Traceur trains until he/she cannot get it wrong.

If someone puts you in front of a 30m high wall, tells you to get over it, and then comes back two years later and you're still there, you've made no progress. You should find another wall.

There are no limits, only obstacles, and any obstacle can be overcome.

Parkour teaches you to be sure of what you are able to do.