A manual, a guide book, also a love letter to humanity. Where have I written that all must submit and obey? We have free will. You don't have to "follow the rules" if that's how you want to think of it. I prefer to think of it in the words of Our Lord, "If you love me you will keep my commandments.....and I and the Father will abide in you."  We are called to abide in God, what does that mean? We have the answer in scripture, the writings of the saints , sacred Tradition-all of which is preserved within the teachings of the Catholic Church . All of us baptized Christians are part of the Mystical Body of Christ, part of the Church, but ALL of us are not the magesterium.