Sometimes we have to just walk away. We all hate to fail, hate to give up, hate to give in, hate to get rejected. We love the challenge of life and want to keep on until whatever we are trying to "win" has been overcome, vanquished, beaten, won. But sometimes it just ain't going to happen and we need to learn to recgonize those moments, learn how to philosophically shrug and walk away with our pride intact and our dignity high.
Sometimes we really want to do something, but to some people it is unrealistic. So instead of knocking ourselves out, cultivate the art of knowing when to walk away and we'll find it a lot less stressful.
If a relationship is coming to its end - ended, instead of playing out long and complicated - and potentially hurtful - end games, learn the art of walking away. If it's dead, leave it. We're not a coward just because we walk away from it - it's here because it is for us, to protect us, to nurture us. This is nothing to do with "them" but all to do with us. If it's dead, don't go digging it up every five minutes to check if there's a pulse. It's dead, walk away.
I'm still learning, letting go and walking away from certain stuffs. It's not bad after all because by doing so, it means I''m exercising control and good decision making powers - I am making my choice rather than letting the emotions, situation take control of me. I believe that is what it means by "E + R = O".