I’m still catching up with songs I don’t know from liturgies posted here. Ruth C. Duck wrote this text that is set to BEACH SPRING, the tune of “God of Day and God of Darkness”.
The text is here (scroll down) and Hymnary has details of the song and and its author. The sheet music is at OCP, along with a lovely sample instrumental introduction.
My backing for this I did a few years ago is not great so I had another go at BEACH SPRING.