This episode contrasts Christianity with Islam in the themes of sin, salvation and ultimate goals. Muslims believe that all people are born without a propensity to sin (original sin) but are corrupted by the world when they engage in idolatry. Salvation then is renouncing idolatry by embracing Islam, the goal of which is submission to Allah. Christianity by contrast insists all mankind is born predisposed against God and the knowledge of God, and pursues a life of idolatry as a result of his rejection of the knowledge of God. (Romans 1:18-25) In salvation, the Christian repents of self-idolatry, putting his faith in Christ as the sin substitute who bore his sin and gave him His righteousness. He receives a new heart in regeneration, one that delights in the knowledge of God, as the Holy Spirit progressively conforms him into the image [knowledge] of Christ. Both Christianity and Islam renounce idolatry and promote total submission to God, but the starting points and end goals are very different, largely based on acceptance/rejection of original sin and the knowability of God Himself.