Just thinking

When I come to DS, I am usually multitasking.  I generally leave the DS window open in case someone needs to vent or if someone needs a shoulder to cry on.
The other day I was all caught up on business issues, so I played computer solitaire. I made a mistake and picked the wrong card so I hit the "undue" button and went back and picked a better card.  
I was thinking, wouldn't it be nice if we all had an "undue" button where we could go back in time and make the right choices!  Dam! I would hit that button quite a few times! I have made many poor choices that I wish I could take back! But in the same sense, how do we grow and how do we learn from our mistakes if we can go back and change everything.
Interesting thought although one good choice that I made was in coming here and meeting so many nice people who have problems just like I do.