QUESTION: Was Jesus in Human Form in the OT?
ANSWER: No, Jesus was not in a human form in the Old Testament. Some interpret the story of in Genesis 18 that one of the three visitors to Abraham was Jesus. Others see the phrase “son of man” in the story of Daniel in the lion’s den as a reference to Jesus. A rule of thumb when interpreting Scripture is that a story cannot mean what it could not have meant to the first hearers/readers. The Old Testament folks did not have a concept of Jesus. They would not have recognized him as a character in a story presented to them to tell them of the journey of God with Israel.
John recounts the birth of Jesus and “he became flesh and tabernacled among us” as the point in time of the incarnation or the “human form” of Jesus.