The shabad Sant actually is not a name or title of a holy man, Sant actually refers to a hirda that permantly resides in God’s court.  In a Sant hirda only God resides 100% in the form of Naam.  The soul of a Sant is always absorbed in the Mahima of Naam.  They become a custodian of this medicine of Naam and they are given the authority by God to give this prescription of the Naam to the deserving candidates.  Our Sant plays the most important role in our spiritual journey.  Sant means the person who has has lost his own identity (ego) and merged himself in the Sat.