“Don't look back until you've written an entire draft, just begin each day from the last sentence you wrote the preceding day. This prevents those cringing feelings, and means that you have a substantial body of work before you get down to the real work which is all in... The edit.”-Will Self
Looking back distracts you from your forward progress.
Looking back might be deceiving.
This is one of those times when what you don’t know can’t hurt you.
Maybe what looks like a T-Rex when you glance in your rearview mirror is actually the Muse having a bad hair day.
So yeah, don’t look over your shoulder until you’ve come to a full and complete stop. Time enough then to do a makeover.