The Marrow of Zen
In the zazen posture, your mind and body have great power to accept things as they are, whether agreeable or disagreeable.
the worst horse is the most valuable one.
"to succeed wrong with wrong"
When you feel disagreeable it is better for you to sit.
In continuous practice, under a succession of agreeable and disagreeable situations, you will realize the marrow of Zen and acquire its true strength.