Psalms 18:26

"With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself froward." The sinner's frowardness is sinful and rebellious, and the only sense in which the term can be applied to the Most Holy God is that of judicial opposition and sternness, in which the Judge of all the earth will act at cross-purposes with the offender, and let him see that all things are not to be made subservient to wicked whims and wilful fancies. Calvin very forcibly says, "This brutish and monstrous stupidity in men compels God to invent new modes of expression, and as it were to clothe himself with a different character." There is a similar sentence in Leviticus 26:21-24, where God says, "and if ye walk contrary unto (or perversely with) me, then I will also walk contrary unto (or perversely, or roughly, or at random with) you." As if he had said that their obstinacy and stubbornness would make him on his part forget his accustomed forbearance and gentleness, and cast himself recklessly or at random against them. We see then what the stubborn at length gain by their obduracy; it is this, that God hardens himself still more to break them in pieces, and if they are of stone, he causes them to feel that he has the hardness of iron." The Jewish tradition was that the manna tasted according to each man's mouth; certainly God shows himself to each individual according to his character.

With the froward - עקש ikkesh, the perverse man; he that is crooked in his tempers and ways. Thou wilt show thyself froward - תתפתל tithpattal, thou wilt set thyself to twist, twine, and wrestle. If he contend, thou wilt contend with him. Thou wilt follow him through all his windings; thou wilt trace him through all his crooked ways; untwist him in all his cunning wiles; and defeat all his schemes of stubbornness, fraud, overreaching, and deceit. My old Psalter has, With the wiked thow sal be wike. Here the term wicked is taken in its true original sense, crooked, or perverse. With the wiked, the perverse, thou wilt show thyself wike, i.e., perverse; from to draw back, to slide. As he draws back from thee, thou wilt draw back from him. It may, as before intimated, come from to seek for enchantments; leaving God, and going to devils; to act like a witch: but here it must mean as above. The plain import is, “If thou perversely oppose thy Maker, he will oppose thee: no work or project shall prosper that is not begun in his name, and conducted in his fear.”

With the pure - Those who are pure in their thoughts, their motives, their conduct. Thou wilt show thyself pure - They will find that they have to deal with a God who is himself pure; who loves purity, and who will accompany it with appropriate rewards wherever it is found. And with the froward - The word used here - עקשׁ ‛iqqêsh - means properly perverse; a man of a perverse and wicked mind. It is derived from a verb - עקשׁ ‛âqash - which means, to turn the wrong way, to wrest, to pervert. It would be applicable to a man who perverts or wrests the words of others from their true meaning; who prevaricates or is deceitful in his own conduct; who is not straightforward in his dealings; who takes advantage of circumstances to impose on others, and to promote his own ends; who is sour, harsh, crabbed, unaccommodating, unyielding, unkind. It is rendered perverse in Deu 32:5; Pro 8:8; Pro 19:1; Pro 28:6; froward here, and in 2Sa 22:27; Psa 101:4; Pro 11:20; Pro 17:20; Pro 22:5; and crooked in Pro 2:15. The word does not occur elsewhere in the Old Testament. Thou wilt show thyself froward - Margin, wrestle. In the corresponding place in 2Sa 22:27 it is rendered, “Thou wilt show thyself unsavory;” though the same word is used in the original. In the margin in that place, as here, the word is wrestle. The original word in each place - פתל pâthal - means to twist, to twine, to spin; and then, to be twisted; to be crooked, crafty, deceitful. In the form of the word which occurs here (Hithpael), it means, to show oneself crooked, crafty, perverse. (Gesenius, Lexicon). […]