Moses claimed that God spoke to him:
God said to Moses, “I AM WHO I AM,” and he said, “You shall tell the children of Israel this: I AM has sent me to you.” (Exodus 3:14 –WEB)
Moses wrote that God described himself with the words, “I AM,” and with this as the description of God, Jesus claimed to be God:
Jesus said to them, “Most certainly, I tell you, before Abraham came into existence, I AM.” (John 8:58)
Jesus validated himself equal to God through that description. Just so there is no debate about Jesus proclaiming himself to be God, Jesus clearly stated it:
“I and the Father are one.” (John 10:30)
The religious leaders knew Jesus claimed to be stating he was God because the penalty for blasphemy—claiming to be God, was death:
Therefore the Jews took up stones again to stone him. (John 10:31)
John wrote that Jesus spoke the word of God and was God. As God, Jesus was certainly able to validate anyone else who is designated to be able to speak for God.
Jesus confirmed the words of Moses as the word of God:
For if you believed Moses, you would believe me; for he wrote about me. But if you don’t believe his writings, how will you believe my words. (John 5:46-47)
The religious leaders in the days of Jesus studied the words of Moses and the OT prophets and believed them to be the word of God. Jesus claimed that Moses spoke the word of God because Moses wrote about Jesus. Moses predicted that God would send Jesus to the world:
Yahweh said to me, “They have well said that which they have spoken. I will raise them up a prophet from among their brothers, like you. I will put my words in his mouth, and he shall speak to them all that I shall command him. It shall happen, that whoever will not listen to my words which he shall speak in my name, I will require it of him. (Deuteronomy 18:17-19)
Moses was told that God will speak through Jesus, called a prophet here, and God will require people to heed the word of God through Jesus. As Jesus stated, those who listen and follow the word of God through Jesus will have eternal life, but those who reject Jesus’ words will have the wrath of God poured out on them. Jesus validated himself as this prophet.
God then told Moses that false prophets will come who will claim to be speaking for God:
But the prophet who speaks a word presumptuously in my name, which I have not commanded him to speak, or who speaks in the name of other gods, that same prophet shall die.” (Deuteronomy 18:20)
The words of false prophets are words of death and destruction. The words of false prophets will bring death even for themselves. Then God informed Moses how to separate false prophets from prophets sent by God:
You may say in your heart, “How shall we know the word which Yahweh has not spoken?” When a prophet speaks in Yahweh’s name, if the thing doesn’t follow, nor happen, that is the thing which Yahweh has not spoken. The prophet has spoken it presumptuously. You shall not be afraid of him. (Deuteronomy 18:21-22)
God told him Moses that he spoke the word of God because he told the world about Jesus, and this ability to speak for God is extended to other prophets that predict the future presence and arrival of Jesus. Prophets who predict that Jesus will come have been sent by God because God will send Jesus as the proof. Only prophets who are proven to predict Jesus have been sent by God.
We can separate false prophets from prophets sent by God through proven predictions of the details of Jesus arrival and mission. Prophets who accurately predicted the details of the Messiah Jesus that have been proven to come true were sent by God and therefore spoke for God. For example, here are several prophets described in the OT that accurately predicted the coming of a Messiah from God—at least according to what has been documented in the Gospels:
- Isaiah 7:14 – from the house of David, “the virgin will conceive, and bear a son, and shall call his name Immanuel” (Matthew 1:18-23)
- Micah 5:2 – “But you, Bethlehem Ephrathah, being small among the clans of Judah, out of you one will come out to me that is to be the ruler in Israel” (Matthew 2:1)
- Zechariah 12:10 – “I will pour on David’s house, and on the inhabitants of Jerusalem, the spirit of grace and of supplication, and they will look to me,whom they have pierced; and they shall mourn for him, as one mourns for his only son, and will grieve bitterly for him, as one grieves for his firstborn.” (John 19:34-37)
- Hosea 11:1 – “When Israel was a child, then I loved him, and called my son out of Egypt.” (Matthew 2:13-15)
- Psalm 22:18 – “They divide my garments among them. They cast lost for my clothing.” (John 19:23-24)
- Malachi 3:1 – “Behold, I send my messenger, and he will prepare the way before me; and the Lord, whom you seek, will suddenly come to his temple; and the messenger of the covenant, whom you desire, behold, he comes!” says Yahweh of Armies. (Matthew 11:4-10)
Jesus also validated the OT prophets as speaking for God as long as they spoke about Jesus:
It is written in the prophets, ‘They will all be taught by God.’ (Isaiah 54:13) Therefore everyone who hears from the Father and has learned, comes to me. (John 6:45)
In summary, from the documentation in the Bible and proven through the documentation of Jesus in the Gospels we learn that Jesus, Moses, and prophets who predicted the coming of Jesus have all spoken for God. But this is true only if Jesus is proven as the Messiah that was predicted by Moses and the OT Prophets.