He arguably wrote the most Zen-like passage in the Christian tradition
To reach satisfaction in all
desire its possession in nothing.
To come to possess all
desire the possession of nothing.
To come to the knowledge of all
desire the knowledge of nothing.
To come to the pleasure you have not
you must go by a way in which you enjoy not.
To come to the knowledge you have not
you must go by a way in which you know not.
To come to the possession you have not
you must go by a way in which you possess not.
To come to be what you are not
you must go by a way in which you are not.
When you turn toward something
you cease to cast yourself upon the all.
For to go from all to the all
you must deny yourself of all in all.
And when you come to the possession of the all
you must possess it without wanting anything.
Because if you desire to have something in all
your treasure in God is not purely your all.
In this nakedness the spirit finds
its quietude and rest.
For in coveting nothing,
nothing raises it up
and nothing weighs it down,
because it is in the center of its humility.
When it covets something
in this very desire it is wearied (Kavanaugh & Rodriguez 1979a:103 )