Charles Spurgeon Commentary Jeremiah 10:14

"Every man is become brutish [and is] without knowledge; every goldsmith is put to shame by his graven image; for his molten image is falsehood, and there is no breath in them." — Jeremiah 10:14 (ASV)

Every man is brutish in his knowledge:

Every idolater proves that he knows no more than a brute beast when he worships a stock or a stone.