Mindfulness and non-attachment

Don’t tire your mind by worrying about what is real
and what isn’t,
About what to accept and what to reject.
If you want to know the One,
let your senses experience what comes your way,
But don’t be swayed and don’t involve yourself in what comes.
The wise man acts without emotion
and seems not to be acting at all.
The ignorant man lets his emotions get involved.
The wise man knows that all things are part of the One.
The ignorant man sees differences everywhere.

Gatha of Seng T'san, Third Chan Patriarch