Unfortunately, life was never made to be simple. We are not provided a reset button to jump start everything again. No potion for our health points, no phoenix down to revive those that are lost. If you are wondering what are these terms, just google it. :)
Sometimes when you look back at what you have done, you will think, why didn't I do it that way? Why didn't I make a better decision? Is there a better decision?
Human are made to be impulsive. To do things that are right to them at times where reasoning cease to exist to them. So when we decide on something, it is the best for us at that point. That is when mistakes happens.
However, we were meant to make mistakes. If we didn't, how are we to learn? How are we to thrive? We are who we are today not only because of the things we were right about, but the things we were wrong about. Like how we know that drinking bad milk causes tummyache and how Thomas Edison was to invented light.
Everyone makes mistakes, and if life were to have a reset button, we will never learn. Or have penicillin for that matter. ;)