Job 15:31

Let - To hinder or obstruct.

Let not him that is deceived -

7. He has many vain imaginations of obtaining wealth, power, pleasure, and happiness; but he is deceived; and he finds that he has trusted בשוא bashshav, in a lie; and this lie is his recompense.

Let not him that is deceived trust in vanity - The sense is, "Let him not trust in vanity. He will be deceived. Vanity will be his recompense." The idea is, that a man should not confide in that which will furnish no support. He should not rely on his wealth and rank; his houses and lands; his servants, his armies, or his power, if he is wicked, for all this is vain. He needs some better reliance, and that can be found only in a righteous life. The word vanity here means that which is unsubstantial; which cannot uphold or sustain; which will certainly give way.

For vanity will be his recompense - He will find only vanity. He will be stripped of all his honors and possessions.

15:31 Vanity - In the vain and deceitful things of this world, he subjoins a general caution to all men to take heed of running into the same error and mischief. Vanity - Disappointment and dissatisfaction, and the loss of all his imaginary felicity. Recompence - Heb. his exchange; he shall exchange one vanity for another, a pleasing vanity for a vexatious vanity.