Charles H. Spurgeon on Psalms 33:17

An horse is a vain thing for safety. Military strength among the Orientals lay much in horses and scythed chariots, but the psalmist calls them a lie, a deceitful confidence. Surely the knight upon his gallant steed may be safe, either by valour or by flight? Not so, his horse shall bear him into danger or crush him with its fall. Neither shall he deliver any by his great strength. Thus the strongest defences are less than nothing when most needed. God only is to be trusted and adored. Sennacherib with all his calvary is not a match for one angel of the Lord, Pharaoh's horses and chariots found it vain to pursue the Lord's anointed, and so shall all the leaguered might of earth and hell find themselves utterly defeated when they rise against the Lord and his chosen.