Todays decisions are tomorrows realities. Remember you have three choices: take it, leave it or change it.
Non-participation gives us hardening of the attitude. Life goes on, and if we do not participate, life still goes on. If a negative attitude is not getting us where we want to go, then why not change the attitude? Reshaping attitudes is possible. Awareness is the key initial step.
Stay away from what might have been, and look at what can be.