Dark Jedi Han

Can you prove Jesus never said he was the son of God?

Also, Mark, Luke, Matthew, and the others did personally know Jesus. But if I remember correctly, they wrote everything down in their old age so it seemed that they had not known Jesus and only written down stories they had heard.

If you're going to criticize the Bible for being written down from memory, you must take into account the Qur'an. Having also been written from memory (most likely after Muhammad's death).