classic waka stream

Think, then, of a heart
that spends its days in the dark
on this side and that,
if you go astray upon
a road no one sent you down

Meaning
Think of a heart that spends its days in the dark on this side and that, if you go astray on a road no one sent you down.
Commentary
Part Three: Agemaki

 Oigimi's reply. She asks him to consider her own state of mind, troubled by what has come of giving her sister to Niou. Refusing his suit, she still says plainly how she fears for the younger, and her difficult position is clear.

 Katagata ni is on this side and that, in several directions. Kurasu is to pass one's days brooding, with kurasu, to darken, sounding through it in answer to his half dark. Hitoyari narazu is of one's own doing, not another's. If he has lost his way, she says quietly, it is by a road he chose himself.
Author
Murasaki Shikibu
Source
Genji Monogatari
Other