CHRIST is our ROCK, our sure FOUNDATION (Isa 28:16, Matt16:18, 1Cor 3:11), the Rock of our Salvation (Ps 89:26, 2Sam 22:47). He contains the waters of life and salvation. "They drank of that spiritual ROCK that followed them, and that ROCK was CHRIST" (1Cor 10:3). Derek studies and compares the 2 stories of WATER flowing from the ROCK, showing how together they give us a picture of the Holy Spirit flowing from Christ. The first is in Exodus 17:1-7 at the start of the 40 years, and the 2nd is in Numbers 20:1-13, 40 years later.
(1) When Moses STRUCK the ROCK with his Rod ('the Rod of God'), living waters flowed from the Rock (Ex 17:6, Ps 105:40-41, Neh 9:15). The Rock was split in 2 (Isa 48:21). The Rod of God was used for Divine Judgment. Jesus is the Source of life and salvation, which flows to us from His (1) death and (2) resurrection. Before His death He was full of God's life, but it was not available for us. It was only released when He was smitten. The split Rock is a picture of Jesus on the Cross, bearing our sin and smitten by God in our place, struck by the Rod of God's judgment. Then, on the basis of His death, God released the waters of life for us to drink. He paid the price so we could drink fromHis River freely.
(2) At the Rock of Kadesh, Moses was told to bring a different Rod, Aaron's priestly Rod that budded (Numbers 17:1-11), that was placed before the Lord in the Tabernacle (Num 10:8,9). This time he was told to just SPEAK to the ROCK (v8), and thereby he would bring forth water from the Rock, for the people to drink. The Rock this time was a high, elevated Rock. Whereas the first Rock represents Christ on earth judged for our sins, once for all (Heb 9:28), this high Rock represents the risen, exalted, ascended Christ in Heaven (Ps 61:2), who possesses the Spirit on our behalf, and now pours Him out upon all who call on Him. They were to look to this Rock above them to be their Source of living water. Moses was meant to hold up Aaron's Rod, the Rod of the High Priest, a Rod of grace not judgment (so he was not to strike the Rock with it), and speak to the Rock and say: "Water come forth" and the water would have flowed from the Rock. This is a picture for us. The Rod that budded represented the authority of the anointed High Priest, which now corresponds to the Name of Jesus, risen from the dead. So, when we lift up the Name of Jesus (our resurrected High Priest), and speak to the exalted Rock (Christ) in prayer, calling upon Him to release His Spirit for us to drink, He pours out His Spirit upon us. The Name of Jesus and faith in His Name are the keys to accessing His resurrection life by prayer.
In the typology of the Rock, Christ had already been judged once for all (Exodus 17), so was not to die again. It is done! We just have to hold the Rod (believe in the Name), lift it up in prayer, and speak to the Rock (call on His Name), and then the waters of the Spirit will flow to us. The typology was meant to show God gives us His Spirit by grace based on Christ's finished work, not because of our works (John 4:10,14, 7:37-39, Rev 21:6, 22:17). This is where Moses sinned and misrepresented God (Ps 106:32-33), breaking the type by striking the Rock twice, making it seem the water flowed as a result of his efforts, rather than by God's grace, so he got the credit (v10-11). Also striking the Rock a 2nd time signified Christ had to die again, because His work on the Cross was unfinished. As a result, God had to discipline Moses (v12). Despite this, the water flowed abundantly (v11, Ps 78:15-20, 114:7-8, Deut 8:15).
Now Christ our Rock has (1) been smitten once for all, and (2) is risen again and pours out His Spirit from Heaven, upon all who call on Him as their Source of abundant and eternal life (Acts 2:33, Rom 10:13). By faith we come to Him as our crucified and exalted Rock of Salvation, and hold up His Name, speaking to Him in prayer, asking Him to release to us His blessings of resurrection life in the Spirit, which He purchased on the Cross for us, and made available to us as a free gift. When we pray, He responds by releasing His Spirit of grace to flow to us for us to drink (believe we receive), so that we become filled with His Spirit. The first time we came to Him and drank, we were born-again, and the Rock (Christ) and His everlasting Fountain of living water (the Spirit) came to live in our spirit (John 4:10,14, 7:37). So now, the Fountain of Life, who is within the Rock (Christ), is also in us and available to fill us, so that as we look to the exalted Christ, and call on His Name to fill us with His Spirit, He fills us from within. So, when we trust in Christ as our Rock of Salvation, not only does He uphold us as our living Foundation, but He lives in us as our abundant life-giving Source of living water (the Holy Spirit) to fill, uphold, bless and empower us for this life and for all eternity.