Exodus 20:24-26

Exo. 20:24, 25, 26. "An altar of earth thou shalt make unto me - And if thou wilt make an altar of stone, thou shalt not build it of hewn stone; for if thou lift up thy tool upon it, thou hast polluted it: neither shalt thou go up by steps unto mine altar." These rules have respect to what was to be done now immediately, the altars they were to erect, and the sacrifices that were to be offered in the wilderness before the building of the tabernacle. God's altar was to be very plain and very low, so that they might have no occasion to go up to it by steps. The heathen greatly adorned their altars with the curious works of their own hands, and worshipped in high places, and built their altars very high, thinking hereby to put great honors on their gods, and make their services very acceptable to them. But God lets his people know that their seeming adorning, by their own art and handy work, will be but polluting, and their recommending themselves by their high altars will be dishonoring themselves, and showing their own nakedness: perhaps typifying this, that whenever men ascend high and exalt themselves in their own works or righteousness in God's service, they show their own nakedness, and pollute his worship, and render the services they offer abominable to God. Mr. Henry has this note on this rule for plain affairs: "This rule being prescribed before the ceremonial law was given, which appointed altars much more costly, intimates that after the period of that law, plainness should be accepted as the best ornament of the external services of religion, and that gospel worship should not be performed with external pomp and gaiety."