All frustrations are self-induced. The outside world can invite us to become upset, but we ultimately accept the invitation. - Don't let others add to our frustrations. Choose to be proactive not reactive.
Letting go isn't blocking memories or thinking sad thoughts and doesn't leave emptiness, hurt or sadness. Letting go isn't about loss and it's not defeat. To let go is to cherish memories, and overcome and move on.
Marianne Williamson - "Something very beautiful happens to people when their world has fallen apart. A humility, a nobility, a higher intelligence emerges at just the point when our knees hit the floor.