Tertullian

“ Rejecting, therefore, what you once believed, you have completed the act of rejection, by now no longer believing: the fact, however, of your having ceased to believe has not made your rejection of the faith right and proper ”

“ Chapter II.—Marcion, Who Would Blot Out the Record of Christ’s Nativity, is Rebuked for So Startling a Heresy.
Clearly enough is the nativity announced by Gabriel. [1] But what has he to do with the Creator’s angel? [2] The conception in the virgin’s womb is also set plainly before us. ”