Therefore, the Catholic Church, relying on these words of Christ and the
following verses teaches that disobeying the Ten Commandments can
cause us to lose our salvation:
Note then the kindness and the severity of God: severity toward those who
have fallen, but Gods kindness toward you, provided you continue in his
kindness; otherwise you also will be cut off (Rom. 11:22).
...but I punish my body and enslave it, so that after proclaiming to others I
myself should not be disqualified (1 Cor. 9:27).
Therefore let any one who thinks that he stands take heed lest he fall (1
Cor. 10:12).
You are severed from Christ, you who would be justified by the law; you
have fallen away from grace (Gal 5:4).
For if we wilfully persist in sin after having received the knowledge of the
truth, there no longer remains a sacrifice for sins, but a fearful prospect of
judgment, and a fury of fire that will consume the adversaries (Heb.
10:26-27).
For if, after they have escaped the defilements of the world through the
knowledge of our Lord and Savior Jesus Christ, they are again entangled
in them and overpowered, the last state has become worse for them than
the first. For it would have been better for them never to have known the
way of righteousness than after knowing it to turn back from the holy
commandment delivered to them (2 Pet. 2:20-21).
Do you know you will go to heaven if you die now?
Fundamentalists believe if they die now, that they are certain of entering
heaven. However, Scripture tells us that St. Paul himself had no such
belief:
I am not aware of anything against myself, but I am not thereby acquitted.
It is the Lord who judges me (1 Cor. 4:4).