1 Kings 3:2 - Albert Barnes' Notes on the Bible

The word “only” introduces a contrast. The writer means to say that there was one exception to the flourishing condition of things which he has been describing, namely, that “the people sacrificed in high-places.” (Compare the next verse.) The Law did not forbid “high-places” directly, but only by implication. It required the utter destruction of all the high-places which had been polluted by idolatrous rites Deuteronomy 12:2; and the injunction to offer sacrifices nowhere except at the door of the tabernacle Leviticus 17:3-5 was an indirect prohibition of them, or, at least, of the use which the Israelites made of them; but there was some real reason to question whether this was a command intended to come into force until the “place” was chosen “where the Lord would cause His name to dwell.” (See Deuteronomy 12:11, Deuteronomy 12:14.) The result was that high-places were used for the worship of Yahweh, from the time of the Judges downward Judges 6:25; Jdg 13:16; 1 Samuel 7:10; 1 Samuel 13:9; 1Sa 14:35; 1 Samuel 16:5; 1 Chronicles 21:26, with an entire unconsciousness of guilt on the part of those who used them. And God so far overlooked this ignorance that He accepted the worship thus offered Him, as appears from the vision vouchsafed to Solomon on this occasion. There were two reasons for the prohibition of high-places; first, the danger of the old idolatry creeping back if the old localities were retained for worship; and, secondly, the danger to the unity of the nation if there should be more than one legitimate religious center. The existence of the worship at high places did, in fact, facilitate the division of the kingdom.