God built humans to use us as soldiers but lost us to the Devil. Since there was no way of washing away the Devil’s elements in humans before Jesus was crucified, all were taken to the Devil in the Old Testament. This is the meaning of death that God told Adam (Genesis 2:17). In the Old Testament, God could not even take the prophets. Thus, in order to wash away sins, which are Devil’s elements, God wished to make the water of life by making Jesus a sacrificial offering.
The sacrifice with Jesus’ blood and flesh as offering was delivered to Heaven and turned into water of life. This water of life, which is the living water, is necessary to wash away the sins (Zechariah 13:1). God spoke about the living water couple times in the Old Testament (Isaiah 55:1, Jeremiah 2:13, Zechariah 14:8, etc.). Jesus promised the living water when he was alive. He said to the Samaritan Woman if she had asked him, he would have given her the living water. (John 4:10) During the Feast of Tabernacles, he said in the temple courts that for those who believe in him, streams of living water will flow from within them (John 7:38).
Jesus thought, after he was crucified and ascended to heaven he would send the living water, wash their sins, and return to earth to take them with him. Thus, he told his disciples that he would return before the generation passed (Matthew 24:34). However, two thousand years have passed, but he is still not able to return. The reason is as follows. After Jesus was crucified, resurrected, and ascended to heaven, he received a sealed book from God that no one was allowed to see, and the book had the plan to fulfill God’s will. The key factor to the plan was to appoint the Overcomer in the final days to wash away the sins with the water of life and make them as soldiers of God. When God’s army is complete, Jesus will return to take them with him. Jesus gave John the Apostle revelation to tell the message, and the essence of the revelation is the promise to make the Overcomer as his witness (Revelation 11:3-4).