The Gospel says that we could not make ourselves righteous and we cannot keep ourselves righteous. Religion says we can do both if we just try hard enough, shape up, and toe the line.

A wide variety of religious flavors exist, but they all come down to behavioral conduct.

Some focus on emptying yourself.
Some focus on morally exemplary behavior.
Some focus on doing more good than bad.
Some declare there is no God, which is the religion of self.

None of that is Christianity no matter what scripture passages are misused to make it seem so.