One of the popular heresy doctrines is that Jesus was not always God, but that he was anointed by God at his baptism. The Bible strongly condemns such false teachings. Jesus was “born of the Holy Ghost”, and was without sin. Even at His birth the angels of God worshipped Him (Heb 1:6).
In Isaiah 9:6, the “child” is called God.
“For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.”
Matt 1:23 Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us.
Mic 5:2 But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting.
All these scriptures very strongly prove that Jesus was God right from his birth. But history records that many false teachers arose and preached doctrines contradictory to what the Bible says. One such person was Cerinthus. He preached that God dwelt in Jesus from his baptism, but left him before his crucifixion.