The sum is, that the worship of God must be spiritual, in order that it may correspond with His nature. For although Moses only speaks of idolatry, yet there is no doubt but that by synecdoche, as in all the rest of the law, he condemns all fictitious services which men in their ingenuity have invented.
John CalvinUnless we endeavor to do good to our neighbor, through our cruelty we transgress this law
John CalvinMen will never worship God with a sincere heart, or be roused to fear and obey Him with sufficient zeal, until they properly understand how much they are indebted to His mercy.
John Calvin