None calleth for justice - Or rather, there is no one who brings a suit with justice; no one who goes into court for the purpose of obtaining justice. There is a love of litigation; a desire to take all the advantage which the law can give; a desire to appeal to the law, not for the sake of having strict justice done, but for the sake of doing injury to others, and to take some undue advantage.
Nor any pleadeth for truth - Or, no one pleadeth with truth. He does not state the cause as it is. He makes use of cunning and falsehood to gain his cause.
They trust in vanity - They confide in quirks and evasions rather than in the justice of their cause.
They conceive mischief - They form plans of evil, and they execute them when they are fully ripe. Compare Job 15:35, where the same phrase occurs. The sense is, that they form plans to injure others, and that they expect to execute them by fraud and deceit.