15. Nor is the water "profane and adulterous" over which the name of God is invoked, even though it be invoked by profane and adulterous persons; because neither the creature itself of water, nor the name invoked, is adulterous. But the baptism of Christ, consecrated by the words of the gospel, is necessarily holy, however polluted and unclean its ministers may be; because its inherent sanctity cannot be polluted, and the divine excellence abides in its sacrament, whether to the salvation of those who use it aright, or to the destruction of those who use it wrong. Would you indeed maintain that, while the light of the sun or of a candle, diffused through unclean places, contracts no foulness in itself therefrom, yet the baptism of Christ can be defiled by the sins of any man, whatsoever he may be? For if we turn our thoughts to the visible materials themselves, which are to us the medium of the sacraments, every one must know that they admit of corruption. But if we think on that which they convey to us, who can fail to see that it is incorruptible, however much the men through whose ministry it is conveyed are either being rewarded or punished for the character of their lives?