Sometimes when light is too strong, you simply lose control of it. the same applies to darkness. that's why we all need a balance of everything.
one of the core values in chinese and asian culture is about balance. balance leads to harmony. but at times i am still easily drawn to obsession and the total engagement that it entails. but i guess eventually passion dies, interests pass, love fades, chemistry disappears ... so if you don't have balance, that means you can't diversify. in the end you either have it all, or lose to none. and that's a risk not many people would dare to try. to further extend this thinking, that explains why we all reserve something to ourselves, mostly not because we don't trust our loved ones, but because we are scared that we would lose it all.