I thought all along that this prayer is from Saint Francis of Assisi, but after researching widely, I discovered that it really originated from American theologian, Reinhold Niebuhr.
According to Wikipedia, this prayer has also be erroneously attributed to Cicero, Thomas Aquinas, Augustine, Marcus Aurelius and many more. Imagine that!
This is another card wherein I did not use any photo. Instead, I just made it using Photoshop's many tools.