The light shines on the water.
The Spirit of God hovered over the waters at both creations: in the beginning (Genesis 1:2) and at Jesus’s baptism (Matthew 3:16). God cleanses and recreates through the washing of baptism. Simple water does not do this, but rather God’s word added to the water. Jesus is the Word of God, and He went into the water to be baptized.
“Baptism is not simple water only, but it is the water included in God’s command and connected with God’s Word.” Baptism “works forgiveness of sins, delivers from death and the devil, and gives eternal salvation to all who believe this, as the words and promises of God declare.” “Christ, our Lord, says in the last chapter of Mark, ‘Whoever believes and is baptized will be saved, but whoever does not believe will be condemned.’” (Mark 16:16).
— Martin Luther’s Small Catechism.
At the Holy Family Shrine in Nebraska a channel of water leads to the sanctuary. This water symbolizes baptism which saves us. In baptism, God puts his name on us, adopts us, and makes us part of his family. We become his, and come under his protection, he brings us into his sanctuary. Through baptism God works faith in our hearts.
For Christ also suffered once for sins, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit, in which he went and proclaimed to the spirits in prison, because they formerly did not obey, when God’s patience waited in the days of Noah, while the ark was being prepared, in which a few, that is, eight persons, were brought safely through water. Baptism, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a good conscience, through the resurrection of Jesus Christ …
— 1 Peter 3:18-22, ESV.