Do they not err that devise evil? but mercy and truth shall be to them that devise good.
Do they not err that devise evil? but mercy and truth (shall be) to them that devise good. Those who employ the same energy in good as the bad, exercise in evil shall have, as their reward, 'mercy and truth' - i:e., the faithful fulfillment of God's promises of salvation, just as the devisers of evil, on the contrary, shall be given up to 'error' and its penalty-perdition.