4. And Abraham circumcised his son. Abraham pursued his uniform tenor of obedience, in not sparing his own son. For, although it would be painful for him to wound the tender body of the infant; yet, setting aside all human affection, he obeys the word of God. And Moses records that he did as the Lord had commanded him; because there is nothing of greater importance, than to take the pure word of God for our rule, and not to be wise above what is lawful. This submissive spirit is especially required, in reference to sacraments; lest men should either invent any thing for themselves, or should transfer those things which are commanded by the Lord, to any use they please. We see, indeed, how inordinately the humours of men here prevail; inasmuch as they have dared to devise innumerable sacraments. And to go no further for an example, whereas God has delivered only two sacraments to the Christian Church, the Papists boast that they have seven. As if truly it were in their power to forge promises of salvation, which they might sanction with signs imagined by themselves. But it were superfluous to relate with how many figments the sacraments have been polluted by them. This certainly is manifest, that there is nothing about which they are less careful, than to observe what the Lord has commanded.