We have a collection of 3 Wisdom quotes from Reinhold Niebuhr
"God grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference." (ID 3097)
"God, give us grace to accept with serenity the things that cannot be changed, courage to change the things which should be changed and the wisdom to distinguish the one from the other." (ID 3160)
"The final wisdom of life requires not the annulment of incongruity but the achievement of serenity within and above it." (ID 3269)