I am constantly amazed at how much we as humans want to add to the Gospel. My denomination attempts to keep it simple (but we all fail, right?) so the teaching in our church as the test of salvation, the test for membership is simply the question that Jesus posed to Peter:
Who do you say that I am?
the candidate for membership/Christian responds with Peter's answer: You are the Christ, the son of the Living God.
I am always moved by the simplicity of the statement and the abundance of God's mercy and blessings that flow from it.