He delighteth not in the strength of the horse - The horse is among the noblest works of God - perhaps the noblest of all the animals that he has made. See the notes at Job 39:19-25. Yet God regards with more interest and pleasure humble piety than he does any mere power, however great and wonderful it may be.
He taketh not pleasure in the legs of a man - Not the same pleasure as in piety; he prefers the humble heart to this. The reference is to man as capable of rapid marches, of quick movements in assaulting an enemy; the allusion being, perhaps, to an army prepared for war - cavalry and infantry - the horse moving on with resistless force - the foot-soldiers with rapid motion.