Charles H. Spurgeon on Psalms 18:26

"The froward one." Here, as in the first promise, the two combatants stand contrasted —the seed of the woman and the serpent — the benignantly bountiful, perfect, pure One, and the froward one, whose works he came to destroy, and who made it his great business to circumvent him whom he feared. The literal meaning of the word is "tortuous," or "crooked," and both the ideas of perversity and cunning which the figure naturally suggests, are very applicable to "that old serpent the devil." From the concluding part of the sentence, I think there is no doubt that it is the latter idea that is intended to be conveyed. God cannot deal perversely with any one; but he outwits the wise, and takes the cunning in their own craftiness. —John Brown.