See here, 1. How we may discern a fool and discover him, a wicked man, for he is a foolish man. If we perceive not in him the lips of knowledge, if we find there is no relish or savour of piety in his discourse, that his communication is all corrupt and corrupting, and nothing in it good and to the use of edifying, we may conclude the treasure is bad. 2. How we must decline such a one and depart from him: Go from his presence, for thou perceivest there is no good to be gotten by his company, but danger of getting hurt by it. Sometimes the only way we have of reproving wicked discourse and witnessing against it is by leaving the company and going out of the hearing of it.

Go from the presence of a foolish man,.... A wicked one; avoid him, shun his company, depart from him, have no fellowship with him, it, being dangerous, infectious, and hurtful;

when thou perceivest not in him the lips of knowledge; when it is observed that his lips pour out foolishness, what is corrupt and unsavoury, unchaste and filthy; what does not minister grace to the hearers, nor is for the use of edifying, nor any ways improving in useful knowledge, but all the reverse: the Targum is,

"for there is no knowledge in his lips,''

in what is expressed by them; some understand this ironically, and render the words thus, "go right against a foolish man" (f); join in company with him, "and thou shalt not know the lips of knowledge", or learn anything by him; if you have a mind to be ignorant, keep company with a foolish man; so Jarchi and Gersom: or rather to this sense the words may be rendered, "go to a foolish man, seeing thou knowest not the lips of knowledge" (g), since thou dost not approve of wise and knowing men, whose lips would teach knowledge; and despisest the Gospel, and Gospel ministers the pope of Rome, as Cocceius on the text serves, and hear him, what his holiness and infallibility says; or some other false teacher.

(f) "e regione viri stulti", De Dieu; so Gussetius, p. 495. and Schultens (g) "Abi ut stes cora in viro stolido", Cocceius.

Avoid the society of those who cannot teach you.