It states,¹⁷³ “Every clever person acts with knowledge, but the fool broadcasts (Yifros-יפרוש) his foolishness.” The explanation is that a wise person even conducts his mundane affairs, such as business transactions, with knowledge-Da’at. The term knowledge-Da’at-דעת refers to adhesion to HaShem, blessed is He, as it states,¹⁷⁴ “and Adam knew-Yada-ידע Eve.” It also states,¹⁷⁵ “Know-Da-דעthe God of your father, and serve Him with a complete heart,” meaning, cleave to the God of your father always, in all your deeds. The fool, however, conducts himself foolishly, so that even if he separates himself-Parush-פרוש from matters of this world, by praying and studying Torah constantly, he remains a fool. For, he studies and prays without adhesion (Dveikut) to HaShem, the Creator, blessed is He, but only for his self-aggrandizement, so that he should be called rabbi. He thus remains a fool.

footnotes: ¹⁷³ Proverbs 13:16 ¹⁷⁴ Genesis 4:1 ¹⁷⁵ Chronicles I 28:9