If the official answer to the question "How do Catholics know what Christ wants them to do?" is that the faithful learn the will of Christ from the Magisterium of the Church, why do you argue that the Holy Father believes this principle should be done away with? I'm lost by your illogic. After all, Lumen Gentium is quite clear, and you need to show obeisance to the Holy Father! "... the college or body of bishops has no authority unless it is understood together with the Roman Pontiff, the successor of Peter as its head. The pope's power of primacy over all, both pastors and faithful, remains whole and intact. In virtue of his office, that is as Vicar of Christ and pastor of the whole Church, the Roman Pontiff has full, supreme and universal power over the Church. And he is always free to exercise this power." May those who would dissent from the magisterial teaching of the Holy Father be purged of their rank ineptitude!