Based on the provided text, what is the philosophical lesson regarding the human mind and making promises?

The text from Chapter 33 delves into the nature of the human mind, describing it as being full of "resolves and counter-resolves," constantly generating waves of conflicting thoughts. It advises that the initial good impulses that arise in the mind should be nurtured and maintained, as they are most beneficial. The narrative uses Appasaheb's story as an example, stating that many people are devoted with their words but hesitate greatly when it's time to give or act, causing their spirit to become downcast. The passage concludes that a true devotee is one who acts exactly as they have spoken, and Sai Baba is capable of granting all worldly or spiritual desires for such a person of undivided faith.