Don't look back can be very good advice if you have been through a tough time or had something bad happen. If you end a relationship or suffer from misfortune then look forward to a brighter future, not back to darker days. As long as you are alive you should have hope, and looking back can not change anything.
Be strong now, because things will get better. It might be stormy now, but it can't rain forever.
One day someone will walk into your life and make you see why it never worked out with anyone else.
Don’t cry to quit! You already in pain, you already hurt! Get a reward from it!