They that make a graven image are all of them vanity; and their delectable things shall not profit; and they are their own witnesses; they see not, nor know; that they may be ashamed.
They that make a graven image (are) all of them vanity - (Isaiah 40:18-20; Isaiah 41:29).
And their delectable things - the idols in which they take such pride and delight.
Shall not profit - (Habakkuk 2:18).
And they are their own witnesses - contrasted with, "ye are my witnesses" (Isaiah 44:8). "They," i:e., both the makers and the idols, are witnesses against themselves, because "they see not, nor know;" the idols palpably see and know nothing (Psalms 115:4-8).
That they may be ashamed. The consequence deducible from the whole previous argument, not merely from the words immediately preceding, as in Isaiah 28:13; Isaiah 36:12. I say all this to show that they are doomed to perish with shame, which is their only fitting end.