The Westminster Shorter Catechism
Q45. What is the First Commandment?
A. The First Commandment is, Thou shalt have no other gods before me.[1]
[1] Exodus 20:3; Deuteronomy 5:7.
When God first issued the Ten Commandments or Decalogue in written form to Moses, He inscribed it on two tablets of stone (Ex 31:18). Many modern scholars believe that all ten commandments were inscribed on each of the two tablets, so that the two tablets were duplicates rather than containing a different section of the Decalogue. This is in keeping with the ancient Near Eastern practice, wherein two covenanting parties would each keep a copy of the covenant stipulations in a safe and sacred place. We can see how, in the case of the covenant that God made with Israel, both copies of the covenant stipulations were kept in the Ark or the Testimony (Ex 25:2122).
Whatever the case, there appears to be a logical division in the Ten
Commandments that prompts theologians to divide the Ten Commandments into two
tables or sectionsthe first table dealing with our duty towards God and the
second our duty towards men. The Jewish historian Josephus, according to the
common agreement of his age, assigns five commandments to each table. Calvin (ICR 2.8.12) and our Confession (WLC 102, 122) favour dividing the
commandments into four and six. Yet others, such as Luther and the Roman
Catholic Church, assign three to the first table and seven to the second. But
these who do, so subsume the Second Commandment (as we understand it) under the
First Commandment and quite illogically divide the Tenth Commandment into two:
Thou shalt not covet thy neighbours house, and Thou shalt not covet thy
neighbours wife, &c. This makes it easy for the Roman Catholics at least
to use images in their worship, for, after all, the Second Commandment, Thou
shalt not make unto thee any graven image, &c, now refers to worshipping
of other gods rather than the mode of worship of the Living and True God.
The First Commandment teaches us what is the only and proper object of our
worship, namely God. In the subsequent questions, each of the commandments will
be expounded by showing us firstly, what the commandment bids us to do;
secondly, what it forbids us to do; and thirdly, what reasons or motives there
may be for its observance.