The source mentions Baba using Dussehra as a teaching moment. Can you explain what he was teaching and how he demonstrated it himself?

Sai Baba used the Dussehra festival to teach a profound spiritual lesson. As detailed in Chapter 42, he suggested that Dussehra represents the auspicious moment for 'Seemollanghan,' which means crossing the border of our worldly existence. He didn't just offer this as a suggestion; he provided a powerful demonstration through his own experience. The text explains that on the very next Dussehra, in the year 1918, Baba chose that auspicious moment to leave his physical body, offering it to the fire of Yoga and merging with the Supreme. This act transformed the concept from a mere suggestion into a lived reality for his devotees to witness.