The greatest lessons I've learned in life come from knowing when it is time to quit. Too often we stay with things because we can't accept loss, we are locked into a faulty belief, assigned an inappropriate value to something, or can't disown a misguided commitment. Sway - The Irresistible Pull of Irrational Behavior by Ori Brafman and Rom Brafman explains this better than anything I have ever read.
To me, knowing when something isn't working is the true measure of wisdom. As I tell myself all the time, the only true wrong decision I make is when I fail to make the next decision that might improve upon or correct a past decision.
