Mary Ever-Virgin: Catholic Encyclopedia
Those who wish can instruct themselves here.
Some excerpt lovingly chosen by yours truly. Emphases mine. If the link should not work, follow the original site to click around.
The perpetual virginity of our Blessed Lady was taught and proposed to our belief not merely by the councils and creeds, but also by the early Fathers. The words of the prophet Isaias (vii, 14) are understood in this sense by
- St. Irenaeus (III, 21; see Eusebius, Church History V.8),
- Origen (Adv. Cels., I, 35),
- Tertullian (Adv. Marcion., III, 13; Adv. Judæos, IX),
- St. Justin (Dialogue with Trypho 84),
- St. John Chrysostom (Hom. v in Matth., n. 3; in Isa., VII, n. 5);
- St. Epiphanius (Hær., xxviii, n. 7),
- Eusebius (Demonstrat. ev., VIII, i),
- Rufinus (Lib. fid., 43),
- St. Basil (in Isa., vii, 14; Hom. in S. Generat. Christi, n. 4, if St. Basil be the author of these two passages),
- St. Jerome and Theodoretus (in Isa., vii, 14),
- St. Isidore (Adv. Judæos, I, x, n. 3),
- St. Ildefonsus (De perpetua virginit. s. Mariæ, iii).
The contrary doctrine is called:
- “madness and blasphemy” by Gennadius (De dogm. eccl., lxix),
- “madness” by Origen (in Luc., h, vii),
- “sacrilege” by St. Ambrose (De instit. virg., V, xxxv),
- “impiety and smacking of atheism” by Philostorgius (VI, 2),
- “perfidy” by St. Bede (hom. v, and xxii),
- “full of blasphemies” by the author of Prædestin. (i, 84),
- “perfidy of the Jews” by Pope Siricius (ep. ix, 3),
- “heresy” by St. Augustine (De Hær. h., lvi).
There’s a lot to click about, but most importantly there’s a lot to be ashamed of.