"You may not control all the events that happen to you, but you can decide not to be reduced by them." 

-Maya Angelou

"Letting go doesn't mean we don't care. Letting go doesn't mean we shut down. Letting go means we stop trying to force outcomes and make people behave. It means we give up resistance to the way things are, for the moment. It means we stop trying to do the impossible--controlling that which we cannot--and instead, focus on what is possible--which usually means taking care of ourselves. And we do this in gentleness, kindness, and love, as much as possible." 

-Melody Beattie

"Take the relationship of love. I may be in love and my girlfriend may be a flawlessly beautiful and wonderful person, but if I can control her completely and become immersed in her perfection, I might as well fall in love with a mannequin. However, if she has a little mole on her cheek, or some kind of unpredictability of character, then the accidental has been introduced into the domain of the orderly, and I can enjoy her humanity more easily." 

-Alan Watts