There is wisdom in knowing your limits and then daring to push past them. Choose to live an exceptional life.
Self-confidence is the most important thing, and this comes from identifying your goals, knowing your limits and roping in all the help you can get.
Parkour is really a practice of getting to know yourself, what you're able to do, what are your limits. As you train, you start knowing what you can do.
Nothing limits you like not knowing your limitations.
Waiting is painful. Forgetting is painful. But not knowing which to do is the worse kind of suffering.
If you always put limit on everything you do, physical or anything else. It will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them.
Your mind is nirvana.