G.I. Williamson, The Shorter Catechism For Study Classes (1970):
The second commandment is broken when men attempt to make a graven image or a picture of the Lord Jesus Christ. The Bible teaches us that there is one God. It teaches us to worship the three persons, the father, the Son, and the Holy Spirit, as one God, the same in substance, equal in power and glory. But Paul tells us that we “ought not to think that the Godhead is like unto gold, or silver, or stone graven by art and man’s device” (Acts 17:29)… There was a time when the Protestants recognized this evil. They saw the images in the Roman Catholic Church and they understood that this was a violation of the second commandment. They realized that this was wrong – this making of images and likenesses of Christ – even though the Roman Catholic Church was careful to say that it did not want people to worship these images, but only to worship the Lord through these images. But now, it seems, many Protestants have accepted the Roman Catholic position. They may not realize this. And they may still think, in their minds, that there is an important difference between a statue (image) and a picture (likeness). But the commandment recognizes no such difference. It forbids us to make any likeness, just as it forbids us to make any image, of the Lord.