Both the original Sleeping Beauty, and the reincarnation of the film, Maleficent, address vengeance, and each is meant to show what harboring negativity and evil can do to one’s soul. The added bonus of the film is addressing forgiveness of those who wrong us.
"But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes." -1 John 2:11
"But I say unto you which hear, Love your enemies, do good to them which hate you." -Luke 6:27