" Perhaps the biggest obstacle is an internal resistance or no to life as it is: we regret the past, worry about the future, and reject our present circumstances. The key to staying in the zone is to let go of this internal resistance and accept the past, trust the future, and embrace the present, just as they are. The key, in other words, is to say yes to life. "

― William Ury , Getting to Yes with Yourself: (and Other Worthy Opponents)