Focus on gratefulness is recognized and rewarded. As the basic principles of human existence to normal health, so everyone has a duty to follow the ethical principles of the Buddha is on duty.
Gratitude is to recognize and reward your merit. The basic principles of humanity. The existence peacefully. So everyone has the duty to comply with the ethical principles of the Buddha. Is performing well
Gratitude is the recognition and favor in return. The basic principles of human beings. For existence normally. So all of that is connected with the ethical of the Buddha.