Augustine said "Thy years are but a day, and thy day is not recurrent, but always today. Thy 'today' yields not to tomorrow and does not follow yesterday. Thy 'today' is eternity."
— St. Augustine, Confessions, Book XI, Chapter XIII Where does he get this idea? This just sounds like a bunch of words thrown together that mean nothing. As you pointed out, the Scriptures say 1000 years is like a day to God. That is not eternal, that's relativity. Jesus cannot be "the same yesterday, today, and forever" in an eternal sense, because when he supposedly "preexisted", he was not the same. He lacked…