What spiritual practice did Sai Baba recommend for achieving complete oneness with him, and what are its effects?

Sai Baba recommended a specific spiritual practice for achieving unity with him, which is detailed in Chapter 44. He advised that by consistently practicing the understanding that "my omnipresence will be experienced," one can attain harmony and "enjoy complete oneness" with him. The result of this practice is a profound inner transformation. Baba explained that focus on the "consciousness-form will be attained, and the inner heart will become pure." He described this purification as being so powerful that it is like a "bath in the Ganges for you, without touching the water of the Ganges."