Looking back isn't going to help you. Moving forward is the thing you have to do.

The longer we keep looking back in the rearview mirror, it takes away from everything that's moving forward.

You can't look back; you have to keep looking forward.

100 Steps forward, 99 back. 1 Step forward, never lookin' - back.

You need to keep looking forward; don't ever look back.

It is not possible to go forward while looking back.