Instructions for Befriending the Darkness

Inspired by the lines from Dogen Zenji's Being-Time:

For the time-being stand on top of the highest peak.

For the time-being proceed along the bottom of the deepest ocean.

An exploration of the interplay of highs and lows, bright times and darkness. What is the wisdom of the night, and how can we open up to it? How do we practice un-knowing? How do we befriend the dark?