Their idols - Their gods - the gods which they worship, as contrasted with the God whom we adore. The design of this description Psalms 115:4-8 is to show the utter vanity of trusting in such gods, and to lead the people of Israel to put their trust in the true God - in Yahweh.
Are silver and gold - Made of silver and gold, and they must have, therefore, the properties of silver and gold. They can be of value only as silver and gold. They cannot do the work of mind; they cannot do the work of God. The psalmist was not disposed to depreciate the real value of these idols, or to throw contempt on them which they did not deserve. He was disposed to treat them fairly. They were silver and gold; they had an intrinsic value as such; they showed in the value of the material how much the pagan were disposed to honor their objects of worship; and they were not held up to contempt as shapeless blocks of wood or stone. The psalmist might have said that most of them were made of wood or stone, and were mere shapeless blocks; but it is always best to do justice to an adversary, and not to attempt to underrate what he values. The argument of an infidel on the subject of religion may be utterly worthless as an argument for infidelity, but it may evince ability, learning, subtilty, clearness of reasoning, and even candor; and it is best to admit this, if it is so, and to give to it all the credit which it deserves as a specimen of reasoning, or as stating a real difficulty which ought to be solved by somebody - to call it “silver and gold” if it is so, and not to characterize it as worthless, weak, stupid - the result of ignorance and folly. He has great advantage in an argument who owns the real force of what an opponent says; he gains nothing who charges it as the offspring of stupidity, ignorance, and folly - unless he can show that it is so.
The work of men’s hands - Shaped and fashioned by people’s hands. They cannot, therefore, be superior to those who made them; they cannot answer the purpose of a God.