On Justification by Faith and Baptism

It was as a gift they were justified, not from the works of the Law but rather by faith and holy baptism — hence, to be sure, his saying, Wash, make yourselves clean. (Isa. 1:16)

While the Law achieved bodily cleansing through the water of purification, then, Christ removes every stain of our souls through holy baptism. We were baptized through the Holy Spirit and water, remember, and every form of wickedness in us, as it were, disappeared and was consumed like some useless rubbish, which is what fire does, after all. Blessed Paul also makes this clear in the words, “By faith Noah was warned and built an ark for the safety of his household,” (Heb. 11:7) which consisted of a few. In other words, “Eight people were saved through water, and baptism which prefigures now saves us, not as a removal of dirt from the body, but as an appeal to God for a good conscience. (1 Pet. 3:21) (Commentary on Isaiah, Chap. 1)