It is indeed taken terribly out of context. They are stating all you have to do is say with your lips that Jesus is Christ? How terribly in conflict they have interpreted that verse against the rest of Scripture, especially
James 2:24 and
Matthew 7:21.
But if you read the sentences around that verse, Paul is clearly talking to the Romans (i.e. Gentiles), who were previously considered outsiders to the faith…i.e. those who did not practice “the law”. He is convincing them that salvation does not come from works of the law (the Mosaic law practiced by Jews). In short, he is telling them that salvation is available for Jews and Gentiles alike via belief in Christ. If you read on, Paul says they must also “trust” God and “call on Him” and he clearly connects what we do with our salvation in many other of his letters and chapters.
As well, having “faith” entails following Christ, not just a semantic declaration. What good is that? Even demons recognize Jesus as the Christ (
Luke 8:27-31). Often when faith is use alone in Scripture, it must therefore be understood as a
synecdoche—an abbreviated form of a more complex idea of “faith working through love in Christ”.