Many do this, they go out and brag about how they work for God witnessing on street corners, in malls, and so forth, but if you look at the fruit of their work all you see are a few who are still lost. If you fire a shot gun into a crowd you will hit a lot of people with a little of the word. If you follow the Lord and His direction then you will be very effective. This is being immersed into the Father, the Son, and the Holy Spirit. Not just water but all of God.
Water represents man, man is born of water, man is made up mostly of water.
God is spirit and is ALL spirit. The word is God speaking, His will and mind at work as well as His emotions. Jesus was this Word made flesh. God is the light, He is light and always has been light and the Holy Spirit is the way, the connection between the flesh and the Spirit. In all things there is the spiritual and the natural.