Letting go gives us freedom, and freedom is the only condition for happiness. If, in our heart, we still cling to anything - anger, anxiety, or possessions - we cannot be free.
Today I know that I cannot control the ocean tides. I can only go with the flow.... When I struggle and try to organize the Atlantic to my specifications, I sink. If I flail and thrash and growl and grumble, I go under. But, if I let go and float, I am borne aloft.