score:5
Baptism leaves an indelible mark on the soul, but heresy separates one from the Church.
Canon 2314, 1917 Code of Canon Law: “All apostates from the Christian faith and each and every heretic or schismatic: 1) Incur ipso facto excommunication
Pope Leo XIII, Satis Cognitum (# 9), June 29, 1896: “… can it be lawful for anyone to reject any one of those truths without by that very fact falling into heresy? – without separating himself from the Church? – without repudiating in one sweeping act the whole of Christian teaching? For such is the nature of faith that nothing can be more absurd than to accept some things and reject others. Faith, as the Church teaches, is that supernatural virtue by which… we believe what He has revealed to be true, not on account of the intrinsic truth perceived by the natural light of human reason [author: that is, not because it seems correct to us], but because of the authority of God Himself, the Revealer, who can neither deceive nor be deceived… But he who dissents even in one point from divinely revealed truth absolutely rejects all faith, since he thereby refuses to honor God as the supreme truth and the formal motive of faith.”
Upvote:6
I'll start with the "state of Christian grace" bit. The common teaching (and probably not limited to Catholics) is that people who die not in a state of grace do not go to heaven. BUT, the church also teaches that we don't know who is in a state of Christian grace, or not.
One of the teachings of the Roman Catholic church is that once a person has been baptized, he or she remains baptized for life. The church also teaches that just not going to church is not sufficient to leave the Catholic church; in order to leave, one must formally renounce one's membership in the church, but even this does not undo baptism.
The church would say that one who has renounced membership will probably not be in a state of grace at the time of death, but that there is no way for a human to know for sure whether the dying person is, or is not in a state of grace.