"He who keeps the commandment keeps his soul, but he who is careless of conduct will die"
This is an important corrective in Protestantism in which we spend so much time speaking about the beliefs of a person. The soul is kept by what your lifestyle is and not just the set of things that you say you believe. It is important to realize that Judgment Day is about what you did, not just what you believed. In fact, what you did really tells the tale of what you believed in spite of the fact of what you said.