Based on the provided text, what is the ultimate purpose behind the incarnation and actions of Saints?

According to Chapter 44, the singular reason for the incarnation of Saints is the upliftment of the world and the salvation of the "poor and wretched." The text explicitly states they have no other duty. Even when fully enlightened and with all desires fulfilled, they remain engaged in performing actions to save the people. Seemingly ordinary human behaviors like laughter and weeping are considered part of a "worldly drama," performed because the actions of great figures serve as a model for the public's own behavior. Therefore, every act, even grieving a broken brick, is tied to this ultimate purpose of spiritual guidance and upliftment.