Prayer for Serenity by Reinhold Niebuhr
“O God, grant me serenity to accept the things I cannot change,
courage to change the things I can and wisdom to know the difference;
living one day at a time, enjoying one moment at a time;
accepting hardships as a pathway to peace;
taking, as Jesus did, this sinful world as it is, not as I would have it;
trusting that You will make all things right if I surrender to Your will;
so that I may be reasonably happy in this life and supremely happy with You forever in the next.”
Found at Jesuit Resources