Solomon, Proverbs 15:8, gives us a short but full commentary on the whole verse, The sacrifice of the wicked is an abomination to the Lord. He that killeth an ox, that is, for sacrifice, as it is expounded by the next words, he that sacrificeth a lamb. The comparisons show God's detestation of ceremonial performances from men of wicked hearts and lives. He that burneth incense, as if he blessed an idol: from hence it is plain that the prophet is not here reflecting upon idolatrous worship, but formal worship; for to say, he that burneth incense to an idol is as he that blesseth an idol, is but to say, he that blesseth an idol blesseth an idol; but upon those who in a formality worshipped the true God, and by acts which he had appointed, such were offering sacrifices, oblation, incense. God by the prophet declares that these men's services were no more acceptable to him than murder, idolatry, or the most horrid profanation of his name. Such would cutting off a dog's neck for sacrifice have been, or offering swine's blood; so little do ritual performances, though instituted by God himself, please God, when they are but mere formalities, as they always are when those that perform them live as they list, lewd and loose lives, and think to save themselves by their prayers, like the whore, Proverbs 7:14,15; not only sinning by human frailty, but taking pleasure in their sins, Proverbs 15:26. To offer a sacrifice with a heart resolved (when it is offered) to go on in sinful courses, is to offer it with an evil mind. This is a dreadful text to those persons who will murder, and steal, and swear, and curse, and lie, and commit adultery, and then come and stand before God in his house, which is called by his name, that is, come to serve him in acts of worship, Leviticus 10:3; see Psalms 50:16-18 Isaiah 1:11-14 Jeremiah 7:9,10 Mt 7:21-23 1 Thessalonians 4:24 1 Timothy 4:8.
Related Commentaries of Isaiah 66:3
Isaiah 66:3
3 He that killeth an ox is as if he slew a man; he that sacrificeth a lamb,a as if he cut off a dog's neck; he that offereth an oblation, as if he offered swine's blood; he that burneth incense, as if he blessed an idol. Yea, they have chosen their own ways, and their soul delighteth in their abominations.