When in brightness within, there is darkness,
but do not with darkness meet it.
When in darkness within, there is brightness,
but do not with brightness see it.
Brightness and darkness are relative,
like front and back steps.
Chán Master Shítóu Xīqiān
(Harmony Of The Unequal And Same)
(Brightness refers to the visibly dualistic and relative.
Darkness refers to the unseen non-dualistic and absolute.
This reminds us to see relative harmony of the relative and absolute,
while not forgetting their differences in function.)