Gregory the Great, on Ezek 2:6

“And thou, O son of man, fear not, neither be thou afraid of their words: for thou art among unbelievers and destroyers, and thou dwellest with scorpions. Fear not their words, neither be thou dismayed at their looks: for they are a provoking house.”

“There is, however, one reason why the society of the wicked must be avoided: lest, if by chance they cannot be corrected, they draw others to imitation; and since they themselves are not changed from their wickedness, they may pervert those who have been joined to them. Hence Paul says: "Evil communications corrupt good manners." And as it is said through Solomon: "Do not be a friend to an angry man, nor walk with a furious man, lest perhaps you learn his ways and take a stumbling block to your soul." Therefore, just as perfect men ought not to flee from perverse neighbors, because they often draw them to righteousness and are themselves never drawn to perversity, so all who are weak ought to avoid the society of the wicked, lest they be delighted to imitate the evils which they frequently observe and cannot correct. For in this way, by hearing the words of our neighbors daily, we take them into our mind, just as by breathing in and out we draw air into our body. And just as bad air drawn in by constant breathing infects the body, so perverse speech constantly heard infects the mind of the weak, so that it wastes away with delight in wicked work and the iniquity of continual discourse.”

Imported from an open dataset — not yet checked against the printed edition.