Loehe has an awesome Holy Trinity Sunday sermon on John 3,1-15. Here is the seventh paragraph from his sermon:
"7. Praise God that we will not be dismissed by our ardent desire! The Lord calls the new birth from the Holy Spirit a new birth from the water, and that He relieve us of all embarrassment. For what we certainly meant by the new water birth is: it is the water of Baptism, the grace-filled water of life, the washing of rebirth in the Holy Spirit. This, water is available – and because we now know that the Holy Spirit works through the water, thus we know where the hem of the garments of Christ are that makes us recover from all of our diseases. Or about the water Baptism would it not be the Baptism of the Spirit? Are those people right, who tear apart the two things that Christ has joined , namely is it correct to separate Spirit Baptism from water Baptism and thusmake this thing unapproachable and but those times unapproachable and completely useless? Or vice versa: The Lord said that one must be born again of water and of the Spirit: Does He teach here about a double path of regeneration, one by water and another one by the Spirit, so that He who ascribes what is attributed to the Spirit, also the water? What kind of teaching should this be? No! Not vain the water and the Spirit is not treated, but the Lord sets together water and Spirit, because the child water belongs to the omnipotent Spirit, because water and the Spirit are together only one Baptism, a gracious water of life and a washing of new birth in the Holy Spirit. If we seek the Spirit by whom we are born anew: He’s in the water of Baptism. Where the water is, there the Spirit is. The water Baptism cannot be divorced from the Spirit Baptism. There is only one Baptism – of water and spirit. Whoever wants to be born again must be baptized. Here the path of regeneration is clearly described. This impossible, hidden secret has become for a man a sweet, easy road, for what is easier for people than the new birth, when one is baptized? The angels sing of this Baptism as the greatest act of God: but how easily do we come to this? How beautiful, how gently, the Lord moves along with His powerful water bath gives birth so that one is born anew, and He scarcely wakes a sleeping child from his bodily sleep!"