Musar su Proverbi 14:7

This is the intent of Shlomo's warning: "do not mingle with those who make changes" (Prov.24:21). If a man claims to you: "a person's mind should always be associated with his fellow men" (Ketuvot 17a), reply to him, "this refers to human beings who act like human beings. Not human beings who act like animals." Shlomo warns further: "Go from before a foolish man" (Prov. 14:7). And King David said: "Fortunate is the man that walks not in the counsel of the wicked, nor stands in the way of sinners, nor sits in the seat of scoffers" (Ps. 1:1). Our sages expounded this: "If he walks, he will eventually stand. If he stood, he will eventually sit" (Avodah Zara 18b). And "I did not sit with men of falsehood, neither did I go with hypocrites. I have hated the congregation of evil-doers, and will not sit with the wicked" (Ps. 26:4-5).

Behold, Shlomo repeatedly exhorted many times on this in seeing the evil of laziness and the greatness of the harm resulting from it. He said "a little sleep, a little slumber, a little folding of the hands to rest. Then shall your poverty come as a traveler" (Mishlei 24:33). For behold, even though the lazy person is not doing evil actively, nevertheless he brings evil on himself through his very inactivity.

"it was all grown over with thorns" - refers to one who seeks the interpretation of a portion of the Torah and does not find it.