Didymus the Blind

It helps us to understand the terms 'first-born' and 'only-begotten' when the Evangelist tells that Mary remained a virgin 'until she brought forth her first-born son' [Matt. 1:25]; for neither did Mary, who is to be honored and praised above all others, marry anyone else, nor did she ever become the Mother of anyone else, but even after childbirth she remained always and forever an immaculate virgin

It helps us to understand the terms 'first-born' and 'only-begotten' when the Evangelist tells that Mary remained a virgin 'until she brought forth her first-born son' [Matt. 1:25]; for neither did Mary, who is to be honored and praised above all others, marry anyone else, nor did she ever become the Mother of anyone else, but even after childbirth she remained always and forever an immaculate virgin