The reason why we have regret is to learn a lesson. If we don’t learn the lesson, then we will continue to regret. You see, regret is simply a lesson that we have yet to learn. However, when you focus on the past, then you decrease your ability to impact your future. So it’s kind of a double-edged sword if you don’t deal with regret.
Let’s imagine for a second, mosquitoes and lions. Mosquitoes are some of the deadliest animals in the world. They literally are in the top 5 of animals that kill humans, yet we don’t really worry so much about them because they’re small.