What is the connection between performing Baba's service and overcoming worldly desires, as explained in the context of Annasaheb's retirement?

As detailed in Chapter 3, when Baba instructed the retired Annasaheb to perform His service, it was not merely for ritualistic purposes but as a path to ultimate liberation. The immediate promise was that his worldly needs would be met and an "eternal treasure" would be found. However, Baba immediately followed this by explaining what this service truly entails: understanding His true, all-pervading nature. The text explains that desires arise in the intellect, not the Soul, and Sai Maharaj is the form of the Soul itself. Therefore, by meditating on Baba's omnipresence and understanding "Who am I," a devotee realizes there is nothing separate from the Self to desire. This realization causes desires to "dissolve like hail heated by the rays of the sun."