SamuelP

Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God, 2 Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment. 3 And this will we do, if God permit. 4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, 5 And have tasted the good word of God, and the powers of the world to come, 6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
Heb 6:1-6 (KJV) As it says, it is impossible to loose your salvation.

My sheep hear my voice, and I know them, and they follow me: 28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. 29 My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand. 30 I and my Father are one. 31 Then the Jews took up stones again to stone him.
John 10:27-31 (KJV) NOTE: they wanted to stone him........ Yes; eternal life and never perish seems easy to understand.

The RCs are also polytheist. They worship Mary, Peter and all the saints,the host. The RC priest must be more powerful than God, as he can, he says, call down god from heaven, to appear in their wafer. The Roman Pantheon has its equivalent in the church of all saints. The same lump of metal, worshiped by the pagans as Jupiter, is now worshiped by Catholics as Peter.
Roman Catholicism is NOT Christian, but pagan.