Salvation is accomplished on the basis of grace, through faith. Good works, human effort, and our best intentions will never be enough to earn salvation. Every person is marked with sin, both deliberate and accidental, and for this reason we deserve to be separated from God.
Only through His mercy and grace can we be saved, leaving no room for bragging. This also means that all who are saved, Jew and Gentile alike, are part of the same spiritual family. There is no cause for hostility between believers; we are all unworthy, and all saved by the same kindness of God.