They are words of gentleness, not of anger; a lesson to us, when we: argue and cannot converse, not by sore and angry words, but by the absence of anger and clamour, (for clamour is the material of anger,) to prove the soundness of our views. Jesus in entering upon high doctrines, ever checks Himself in compassion to the weakness of His hearer: and does not dwell continuously on the most important truths, but turns to others more humble. Whence it follows: If I have told you earthly things, and ye believe not, how shall ye believe if I tell you of heavenly things.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. xxvi. 3