When created a cardinal, the candidate promises and swears to be constantly obedient to "Blessed Peter in the person of the Supreme Pontiff N., and of his canonically elected Successors". This is because the Pope is his temporal boss ... i.e. the person in authority over him in the institution of the church (you are the rock upon which I will build my church, etc, etc) ... of course, you twist this by referring to the eternal master ... but it makes you sound so much like a cafeteria catholic who doesn't like the current incumbent of the chair of Peter ... gosh, how the worm has turned!