Worshiping Images

I am reading Knowing God by J.I. Packer and I came across an interesting comment about worshipping images of the Godhead.

Commenting on the Second Commandment in Ex 20:4-5 he says, "In its Christian application, this means that we are not to make use of visual or pictorial representations of the triune God, or of any person of the Trinity, for the purposes of Christian worship. The commandment thus deals not with the object of our worship, but with the manner of it; what it tells us is that statues and pictures of the One whom we worship are not to be used as an aid to worshipping him." He goes on to say that this outlaws any pictorial representation of Christ and even may rule out any pictorial aids for teaching.

I'm not quite sure I agree with him. I have some ideas why, but I am more interested in hearing what others have to say. Let me know what you think.