The mind of a Zen Master is perfectly straightforward.
He is neither front or back and is without deceit or delusion.
Every hour of the day,
what he hears and sees are ordinary sights and sounds,
but nothing is distorted.
He is perfectly unattached to things,
and thus doesn't need to shut his eyes and ears.
Because he has eliminated delusion,
perverted views and bad thinking habits,
he is clear and tranquil as an autumn stream.
--Kuei-Shan