What is the moral lesson of the story ibong adarna?

The moral lesson of Ibong Adarna is the power of forgiveness and the importance of resisting temptation. All three brothers in the story succumb to temptation: the first two are lulled by the Adarna and turned to stone, and overcome by jealousy which leads them to act cruelly, while Don Juan succumbs to the pleasure of palace life and abandons Maria. However, Don Juan and Maria are both forgiving people and a happy ending is achieved in large part due to their capacity for forgiveness.