To the Jews who used their reason, a rational creature, i.e. an Angel, ought to preach. But the Gentiles who knew not to use their reason are brought to the knowledge of the Lord, not by words, but by signs; to the one prophecy, as to the faithful; to the other signs, as to the unbelievers. One and the same Christ is preached, when of perfect age, by Apostles; when an infant, and not yet able to speak, is announced by a star to the Gentiles; for so the order of reason required; speaking preachers proclaimed a speaking Lord, mute signs proclaimed a mute infant.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. in Ev. Lib. i. Hom. 10