This is a symbol of baptism, which now saves you-- not the putting away of the filth of the flesh, but the answer of a good conscience toward God, through the resurrection of Jesus Christ,
But the answer of a good conscience The word question, or questioning, is to be taken here for “answer,” or testimony. Now Peter briefly defines the efficacy and use of baptism, when he calls attention to conscience, and expressly requires that confidence which can sustain the sight of God and can stand before his tribunal. For in these words he teaches us that baptism in its main part is spiritual, and then that it includes the remission of sins and renovation of the old man; for how can there be a good and pure conscience until our old man is reformed, and we be renewed in the righteousness of God? and how can we answer before God, unless we rely on and are sustained by a gratuitous pardon of our sins? In short, Peter intended to set forth the effect of baptism, that no one might glory in a naked and dead sign, as hypocrites are wont to do. 