Can I be a Catholic if I do not believe everything the Church teaches?
The OP was about the “Infallibility of the Church” as a question.
It was asked by a Baptist, by a person the Catholic Church considers “Catholic” in virtue of his Baptism, but also out of Communion with the Church because he refuses to submit to the authority and teaching and practices required of Catholics.
Now, as the thread progressed, it is showing clearly that Glenn requires that the Church change its teachings; he does not as in the OP simply want to know whether he can “lawfully” verbally disagree within the church (participate in the Sacrament of the Body and Blood of our Lord while claiming it is not actually the Body and Blood of our Lord) and “lawfully” practice a piety and religion contrary to Church teaching (never confess to a priest).
The fact is, however, that Catholics are not here to prove the infallibility of the Church, not here to prove that Tradition and the living Papacy and Magisterium provide to us the true interpretation of Scripture. We are not answering your “Why?”; we are saying simply what is (“Infallibility in Doctrine”) in the Catholic Church. If you wish to participate, “Welcome”. If not, we remain in the world in front of you as we are, a strange group in your midst that you cannot understand. You cannot understand how we think we are eating Flesh and drinking Blood in Communion, offering Sacrifice at the Mass, thinking a person can grant us full pardon for our sins, absolve us and renew the Holy Spirit in us. You cannot understand how we say we are saved by faith and also say we must do acts of Virtue (be virtuous) to inherit the Kingdom of God and of his Christ.
The OP was asked, and answered, but now the requirement of the protestants is that the Catholic Church become protestant in its understanding of Scripture and Doctrine and Authority.
Sorry, we obey the Pope and our Bishops and Priests as our teachers, faithful to the Apostles who sent them to us. We accept the Councils’ findings. We cannot resist the Holy Spirit that shines so bright within our souls, and diffuses them with virtues to see and light to illuminate them. Such delight I never found as a Lutheran, a very, very, well educated Lutheran. This joy can only be exceeded by that of the sight of the LORD face to Face, ‘I am’ to ‘I AM’.