
If Luther is willing to accept nothing except what is plainly set down in Scripture, why does he believe in the perpetual virginity of Mary? There is nothing to prove this in Scripture and Helvidius actually took it upon himself to prove the contrary, relying on no other authority than that of Scripture.
Thomas More, "An Answer to Martin Luther," The Essential Thomas More (Canada: Mentor-Omega Books, 1967), p. 112.