I was recently riding in the car as a passenger in the front seat. I sat sideways and chatted with the people in the back seat. After a few minutes, however, I became quite nauseous. I think I was car sick. I turned back around and looked out the front window, and my stomach settled. I tried to look back again to chat, but found that looking back made me sick again. I had to keep looking forward to feel better.
Often in our lives we have done things that cause us pain and regret. Whether those things are accidental or not, continuing to look back can make us sick. To feel better, we have to keep looking ahead.
That's not to say you never glance back. Glancing back in the car enables you to change lanes and travel safely, so you don't hit anyone else. Glancing back to glean wisdom from your past mistakes, to come to terms with them is a good thing. As long as you are just glancing back and not looking back.
Look forward. Or better yet, look up. Keep your eyes on Jesus. Just don't look back. It will make you sick.
I lift up my eyes to the mountains— where does my help come from? My help comes from the LORD, the Maker of heaven and earth. Psalm 121:1,2