Charles H. Spurgeon on Psalms 106:20

Thus they changed their glory into the similitude of an ox that eateth grass. They said that they only meant to worship the one God under a fitting and suggestive similitude by which his great power would be set forth to the multitude; they pleaded the great Catholic revival which followed upon this return to a more ornate ceremonial, for the people thronged around Aaron, and danced before the calf with all their might. But in very deed they had given up the true God, whom it had been their glory to adore, and had set up a rival to him, not a representation of him; for how should he be likened to a bullock? The psalmist is very contemptuous, and justly so: irreverence towards idols is an indirect reverence to God. False gods, attempts to represent the true God, and indeed, all material things which are worshipped, are so much filth upon the face of the earth, whether they be crosses, crucifixes, virgins, wafers, relics, or even the Pope himself. We are by far too mealy mouthed about these infamous abominations: God abhors them, and so should we. To renounce the glory of spiritual worship for outward pomp and show is the height of folly, and deserves to be treated as such.