John Chrysostom

"And art confident that thou thyself." Here again he does not say that thou art "a guide of the blind," but "thou art confident," so thou boastest, he says. So great was the unreasonableness of the Jews. Wherefore he also repeats nearly the very words, which they used in their boastings. See for instance what they say in the Gospels. "Thou wast altogether born in sin, and dost thou teach us?" (John ix. …

Homily on Romans 6 ↗

Theophylact of Ohrid

Above he said that hearing the law brings no benefit if doing it is not joined to it; "for not the hearers of the law," he says, "are righteous before God, but the doers of the law" (v. 13), now he says something greater, namely: even if you were a teacher, but if you do not fulfill the law, then not only do you gain no benefit for yourself, but you also bring upon yourself a greater punishment. And since the Jews greatly boasted of their dignity as teachers, from this especially he proves that they are worthy of ridicule. …

Commentary on Romans ↗

Thomas Aquinas

Then he mentions its fruit with respect to others who find themselves in three different situations, so far as knowledge of the law is concerned. For some are entirely ignorant of the law, because they lack natural talent, just as a man is physically blind, because he lacks visual power: we grope for the wall like the blind (Isa 59:10). …

Commentary on Romans ↗