Charles H. Spurgeon on Psalms 7:14

"He travaileth with iniquity, and hath conceived mischief." All note that conceiving is before travailing, but here travailing, as a woman in labour, goeth first; the reason whereof is, that the wicked are so hotly set upon the evil which they maliciously intend, that they would be immediately acting of it if they could tell how, even before they have conceived by what means; but in fine they bring forth but a lie, that is, they find that their own hearts lied to them, when they promised good success, but they had evil. For their haste to perpetrate mischief is intimated in the word rendered "persecutors" (verse 13), which properly signifieth ardentes, burning; that is, with a desire to do mischief —and this admits of no delay. A notable common-place, both setting forth the evil case of the wicked, especially attempting anything against the righteous, to move them to repentance —for thou hast God for thine enemy warring against thee, whose force thou canst not resist —and the greedy desire of the wicked to be evil, but their conception shall all prove abortive. J. Mayer, in loc.