Genesis 19:17
American Standard Version
17 And it came to pass, when they had brought them forth abroad, that he said, Escape for thy life; look not behind thee, neither stay thou in all the Plain; escape to the mountain, lest thou be consumed.
When God brings you out of a situation, don't look back. In this verse, Abraham's nephew Lot was allowed to leave Sodom and Gomorrah before it was destroyed. The angel told him to escape for his life and don't look back. When God delivers you, don't look back. Sometimes when you look back, you are tempted to go back.
Once God has brought you out of your personal Sodom and Gomorrah, don't look back. Keep looking forward. Keep moving forward. There is nothing for you back there. You can rejoice as you think about how far God has brought you. Think back but don't look back. If you look back, you may go back. If you go back, you will be destroyed!
God Bless