C. F. Keil and Franz Delitzsch on Proverbs 11:20

Pro 11:20

The following proverbs are especially directed, as connected with this כן, against the contradiction of the external appearance and of the masked internal nature. 20 An abomination to Jahve are the crookedly dishonest of heart,      And they who are of honest walk are his delight.

We read, Pro 2:15; Pro 8:8, עקּשׁ (the form of the transgressions); but here, where the “crookedness” is transferred to the heart, we require another word, which renders the idea of falseness, the contrary of directness, lying in it, without any mixture of the fundamental conception flexuosus or tortuosus. תּמימי דרך are not only those whose walk is externally without offence and blameless, but, in conformity with the contrast, those whose manner of conduct proceeds from a disposition that is pure, free from deception and concealment. Jerome, et voluntas ejus in iis qui qimpliciter ambulant. But the word is not bit|mymy; they the upright are themselves His רצון (Pro 11:1) delight: He regards them, and only them, with satisfaction.