There is no place for exertion or effort in Zen;
it is just a matter of being normal and non-obsessed,Taking care of bodily functions,
dressing and eating,  lying down when tired.
Fools laugh at me; it is the wise ones who understand this. An ancient said,
“Those who work on externals are all ignorant.”

Linji Yixuan (?-866), Linji Yixuan was the founder of the Linji school of Chan Buddhism during Tang Dynasty China.