John Gills Exposition of the Bible Commentary - Psalms 66:18
If I regard iniquity in my heart ,.... There was iniquity in his heart, as there is in every good man's heart, and a great deal too; it is full of it; and it should be regarded in some sense, so as to guard against it, and pray to be kept from it, that it may not break forth into action; and so as to loath it, abhor it, and be humbled for it; but not so as to nourish and cherish it, to take delight and pleasure in it: or "if I look upon it" F8 אם ראיתי "si vidi", Pagninus, Montanus;... read more
Matthew Henry's Complete Commentary - Psalms 66:13-20
The psalmist, having before stirred up all people, and all God's people in particular, to bless the Lord, here stirs up himself and engages himself to do it. I. In his devotions to his God, Ps. 66:13-15. He had called upon others to sing God's praises and to make a joyful noise with them; but, for himself, his resolutions go further, and he will praise God, 1. By costly sacrifices, which, under the law, were offered to the honour of God. All people had not wherewithal to offer these... read more