“Supreme Master”is the wisdom of a spiritual practitioner. We’re the children of God, so we are also the Supreme Master. Calling that title to remind ourselves that we are the Supreme Master, we have the Supreme Master inside. And saying it to remind ourselves of our Supreme wisdom, to remember our brilliant wisdom. Don’t have to attain it. You already have it. You just don't know it. Everyone has Buddha nature within. You already are the Supreme Master even before you practice. We practice in order to bless the world, then later the world will be lifted higher through our practice.