Things are always changing, so nothing can be yours.
In the zazen posture, your mind and body have, great power to accept things as they are, whether agreeable or disagreeable.
The way that helps will not be the same; it changes according to the situation.
Each of you is perfect the way you are ... and you can use a little improvement.
You should rather be grateful for the weeds you have in your mind, because eventually they will enrich your practice.
Those who sit perfectly physically usually take more time to obtain the true way of Zen.