"You tell me, some of you, that I am always beating that Anvil-that obedience to Christ is Christianity. Let me die insisting upon it. For my Lord insists upon it." George MacDonald
In seminary I was taught that Roman Catholicism teaches salvation in Christ is by works. This is the arguing point by many Protestants for disagreement because Protestants insist that salvation is by grace alone, by faith alone, in Christ alone. I was taught at seminary that Rome teaches the grace of God is infused sacramentally by performing the sacraments, such as communion, in order to receive salvation in Christ. I learned there is no salvation outside the church. We are not saved by our works, but our works are proof of our salvation in Christ.
James 2:14-26, "What good is it, my brothers, if a man claims to have faith but has no deeds? Can such faith save him? Suppose a brother or sister is without clothes and daily food. If one of you says to him, "Go, I wish you well; keep warm and well fed," but does nothing about his physical needs, what good is it? In the same way, faith by itself, if it is not accompanied by action, is dead. But someone will say, 'You have faith; I have deeds.' Show me your faith without deeds, and I will show you my faith by what I do. You believe that there is one God. Good! Even the demons believe that- and shudder. You foolish man, do you want evidence that faith without deeds is useless? Was not our ancestor Abraham considered righteous for what he did when he offered his son Issac on the altar? You see that his faith and his actions were working together, and his faith was made complete by what he did. And the scripture was fulfilled that says, 'Abraham believed God, and it was credited to him as righteousness,' and he was called God's friend. You see that a person is justified by what he does and not by faith alone. In the same way, was not Rahab the prostitute considered righteous for what she did when she gave lodging to the spies and sent them off in a different direction? As the body without the spirit is dead, so faith without deeds is dead."