According to Osho, service to the saints matters not as utility but as a loving pretext to remain near the master. In that nearness one 'catches' their presence, is dyed in their color, and gains the courage to leap into the unknown. Proximity becomes transmission: Upanishadic insight arises, the heart hears the sky's call, and the disciple's wings unfurl.
Serving saints keeps you close to their presence so their wisdom and courage naturally rub off on you.