The twelve Apostles are considered to be the foundation of the Church, the Body of Christ. "And the wall of the city had twelve foundations, and in them the names of the twelve Apostles of the Lamb." (Revelation 21:14) The twelve precious stone layers
in the foundation also represent the Apostles and so do the twelve trees yielding their fruit every month for the healing of the nations.
We are polluted water and are rather in need of healing. Somehow the Word of God isn't enough, we want to paint our own pictures. But God breathed: "And He showed me a pure river of water of life, clear as crystal, proceeding out of the
throne of God and of the Lamb.
"In the midst of the street of it, and on either side of the river, [was there] the tree of life, which bare twelve [manner of] fruits, [and] yielded her fruit every month: and the leaves of the tree [were] for the healing of the nations.(Revelation 22:1,2)
The Baptism of the Holy Spirit is the fulfillment of Jesus' promise to send the Holy Spirit. The purpose of the coming of the Holy Spirit was to glorify Jesus Christ.
"Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send Him unto you.
"And when He is come, He will reprove the world of sin, and of righteousness, and of judgment: Of sin, because they believe not on me; Of righteousness, because I go to my Father, and ye see me no more; Of judgment, because the prince of this world is judged. I have yet many things to say unto you, but ye cannot bear them now.
"Howbeit when He, the Spirit of truth, is come, He will guide you into all truth: for He shall not speak of Himself; but whatsoever He shall hear, [that] shall He speak: and He will show you things to come. He shall glorify me: for He shall receive of mine, and
shall show [it] unto you." (John 16:7-14)