Based on Nana Chandorkar's explanation in Chapter 39, what are the three essential actions for a disciple to gain knowledge from a Guru?

In his explanation to Sai Baba, Nana Chandorkar outlined three key actions for a seeker to receive knowledge, based on his understanding of the Gita verse. As described in Chapter 39, these actions are: first, 'prostrating at the Guru's feet' (pranipatena), which signifies humility and surrender; second, 'respectful questioning' (pariprashnena), which reflects a sincere and earnest desire to understand the truth; and third, 'serving the Guru with one's life' (sevaya), which demonstrates devotion and commitment. Nana conveyed that according to the scripture, it is through this three-fold path that the wise will instruct a disciple in supreme knowledge.