הֶֽחָכָם֙ עֵינָ֣יו בְּרֹאשׁ֔וֹ וְהַכְּסִ֖יל בַּחֹ֣שֶׁךְ הוֹלֵ֑ךְ וְיָדַ֣עְתִּי גַם־אָ֔נִי שֶׁמִּקְרֶ֥ה אֶחָ֖ד יִקְרֶ֥ה אֶת־כֻּלָּֽם׃
The wise man, his eyes are in his head; But the fool walketh in darkness. And I also perceived that one event happeneth to them all.
Mesilat Yesharim
Therefore he whose eyes are on his head (Kohelet 2:14), should be more watchful to scrutinize the deeds of someone who he wishes to acquire as a friend, advisor, or workers over his household than he is watchful to scrutinize his food and drink. For his food and drink can only damage his body while his friends and workers can destroy his soul, belongings and all of his honor. King David peace be unto him said: "He will not dwell within my house, he who practices deceit. He who follows the way of the innocent, he will serve me" (Tehilim 101:6-7).