Many short Christian stories teach forgiveness. The story of the prodigal son is a great example. The father forgives his son who has wasted his inheritance and welcomes him back with open arms. This shows that no matter how far we stray, God is always ready to forgive us if we turn back to Him.
In short Christian stories, often the moral is about love. For example, in the story of Jesus washing the disciples' feet, it shows humility and selfless love. Jesus, being the Son of God, took on the role of a servant. It teaches us to love others without expecting anything in return.