We can not go back and fix the past no matter how much we want to but the future is wide open to us. Whatever we do today will change tomorrow and when that becomes our past we want it to be better than our mistakes so changing today is the only solution. Anything can be possible in the future so allow yourself to find these changes and embrace them now so you can not have the regrets in the past.
https://www.brainyquote.com/quotes/lyndon_b_johnson_103549?src=t_positive