Some people say "don't look behind". Another say "watch your back". Maybe you have to do both, don't look behind while keep watching your back.
What left behind can't be erased and what stays on your back can't be forbidden. Those two things are different. Although to look both you have to turn around. The similarity is both might not things you are considered at. Things that you have to ignore.
Maybe this post seem absurd. She thinks so. But, yeah, now things are overturned to her.