Reinhold Niebuhr? Winnifred Wygal? Mrs. Harrie R. Chamberlin? Mrs. Lenore Stone Meffley? Edith Theodora Ames? Bram Stoker? Anonymous? Dear Quote Investigator: Here are two versions of the famous Serenity Prayer: God grant me the serenity to accept the things I cannot change, courage to change the things I can and wisdom to know the difference. …