There is testimony in the Bible of biblical authors describing themselves in the womb in very personal terms. In Psalm 51:5, David refers to himself in the womb as "I" and "me". It was David in the womb of his mother, it wasn't an it or a thing. It wasn't a "pre-David". Isaiah speaks the same way in Isaiah 49:1. He says, "The LORD called Me from the womb; From the body of My mother He named Me." God's call upon Isaiah came before he was born. When the prophet was in the womb of his mother, God called him. Jeremiah 1:5 says, "Before I formed you in the womb I knew you, And before you were born I consecrated you; I have appointed you a prophet to the nations." Before Jeremiah was even formed, God knew him.