(taken from Genesis 4—a story of creation)
If we are fortunate, we live long enough to regret a few things. Feelings of regret suggest that we have learned a bit along the way and that we would do some things differently were we to have the chance. This is not a bad thing.
Experience teaches, but there are many things we need not learn from experience. As assuredly as there are situations we would love to handle differently were they to come up again, there are just as many choices the results of which we wish we could undo, but we can't. Our choices often set off a chain of reactions that are far beyond our ability to control. We can only choose the seeds we plant and what we feed them, but we don't get to choose whether, when or how they grow.
Humanity doesn't seem particularly mindful of this truth in our story