As you think, so shall you become.
Can you look at a situation without naming it? Naming it, making it a word, causes fear.
The more relaxed the muscles are, the more energy can flow through the body. Using muscular tensions to try to 'do' the punch or attempting to use brute force to knock someone over will only work to opposite effect.
As you think, you shall become
Endurance is lost rapidly if one ceases to work at its maximum.
You cannot force the Now. โ But can you neither condemn nor justify and yet be extraordinarily alive as you walk on? You can never invite the wind, but you must leave the window open.