How did the behavior of Khaparde, Noolkar, and Butti differ from that of other devotees in Sai Baba's presence?

The text in Chapter 27 highlights a distinct difference in devotional styles. It states that while most of Baba's countless devotees spoke with him freely, sometimes even talking back without hesitation, a select few demonstrated their reverence through silence. Dadasaheb Khaparde, Noolkar, and Butti were unique in that they had taken a 'vow of silence' before Baba. Instead of engaging in conversation, they would simply bow their heads at his feet. The author notes their 'humility was indescribable, and so was their modesty in listening.' Even Khaparde, a renowned orator, would become silent in the Masjid, acknowledging that the brilliance of scholarship was dim before the spiritual presence of Sai Baba.