Perhaps you'll enjoy the full Serenity Prayer as much as I did. I was only aware of the first part, and enjoy it even more in it's entirety: The Serenity Prayer
God grant me the serenity
to accept the things I cannot change;
courage to change the things I can;
and wistom to know the difference.
Living one day at a time;
Enjoyiing one moment at a time;
Accepting hardships as the pathwy to peace.
Taking, as He did, this sinful world
as it is, not as I would have it;
Trusting that He will make all things right
if I surrender to his will.
That I may be reasonably happy in this life
and supremely happy with Him,
Forever in the next.
- Reinhold Niebuhr