Create a compassionate and devotional watercolor art piece representing the essence of forgiveness, derived from Matthew 6:14-15 of the Christian faith. The painting should not contain any text. Instead, it should include symbols or imagery such as open hands signifying mercy, a heart signifying love, and light rays signifying divine grace. These elements should subtly communicate the message of this verse without directly using words or text. The visuals should resonate with the teachings of Christianity, promoting a sense of reverence and devotion.