Walked, i.e. conversed in the world, dealt with men. With vanity, i.e. with lying, or falsehood, or hypocrisy, as this word is oft used, as Psalms 4:2, Psalms 12:3 36:3 Proverbs 30:8, and as the next words explain it. If my foot hath hasted to deceit; if when I have had any temptation or opportunity of enriching myself, by defrauding or wronging others, I have readily and greedily complied with it, as hypocrites (such as you account me) use to do, and have not rejected and abhorred it; for more is here understood than is expressed. The sense is imperfect, and supposeth an imprecation, which is either understood, after the manner of the Hebrews, or expressed in the next verse.
Related Commentaries of Job 31:5
Job 31:5
5 If I have walked with vanity, or if my foot hath hasted to deceit;