If I regard iniquity in my heart - literally, "If I have seen iniquity in my heart." That is, If I have indulged in a purpose of iniquity; if I have had a wicked end in view; if I have not been willing to forsake all sin; if I have cherished a purpose of pollution or wrong. The meaning is not literally, If I have "seen" any iniquity in my heart - for no one can look into his own heart, and not see that it is defiled by sin; but, If I have cherished it in my soul; if I have gloated over past sins; if I am purposing to commit sin again; if I am not willing to abandon all sin, and to be holy.

The Lord will not hear me - That is, He will not regard and answer my prayer. The idea is, that in order that prayer may be heard, there must be a purpose to forsake all forms of sin. This is a great and most important principle in regard to prayer. The same principle is affirmed or implied in Psalm 18:41; Psalm 34:15; Proverbs 1:28; Proverbs 15:29; Proverbs 28:9; Isaiah 15:1-9; Jeremiah 11:11; Jeremiah 14:12; Zechariah 7:13; John 9:31. It is also especially stated in Isaiah 58:3-7. The principle is applicable

(a) to secret purposes of sin; to sinful desires, corrupt passions. and evil propensities;

(b) to acts of sin in individuals, as when a man is pursuing a business founded on fraud, dishonesty, oppression, and wrong;

(c) to public acts of sin, as when a people fast and pray Isaiah 58:1-14, and yet hold their fellow-men in bondage; or enact and maintain unjust and unrighteous laws; or uphold the acts of wicked rulers; or countenance and support by law that which is contrary to the law of God; and

(d) to the feelings of an awakened and trembling sinner when he is professedly seeking salvation.

If there is still the love of evil in his heart; if he has some cherished purpose of iniquity which he is not willing to abandon; if there is any one sin, however small or unimportant it may seem to be, which he is not willing to forsake, he cannot hope that God will hear his prayer; he may be assured that he will not. All prayer, to be acceptable to God, must be connected with a purpose to forsake all sin.

If I regard iniquity in my heart - "If I have seen (ראיתי raithi) iniquity in my heart," if I have known it was there, and encouraged it; if I pretended to be what I was not; if I loved iniquity, while I professed to pray and be sorry for my sin; the Lord, אדני Adonai, my Prop, Stay, and Supporter, would not have heard, and I should have been left without help or support.

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" (h), as it may be rendered; that is, with approbation of it, and satisfaction in it, and ordered his conversation according to it; or acted the deceitful and hypocritical part in prayer; or had any evil intention in his petitions, to consume on his lusts what he asked for;

the Lord will not hear me; for the Lord hears not sinners that delight in sin, and live in it; neither profane sinners nor hypocrites; see John 9:31.

(h) "si vidi", Pagninus, Montanus; "si aspexi", V. L. "si conspexi", Gejerus.

{k} If I regard iniquity in my heart, the Lord will not hear me:

(k) If I delight in wickedness, God will not hear me, but if I confess it, he will receive me.

66:18 Iniquity - Any sin. In heart - If my heart had been false to God, although I might have forborne outward acts. If I had been guilty of that, by heart was set upon sin, or I desired only that which I resolved in my heart to spend upon my lusts.

18. If I regard iniquity in my heart-literally, "see iniquity with pleasure."

66:13-20 We should declare unto those that fear God, what he has done for our souls, and how he has heard and answered our prayers, inviting them to join us in prayer and praise; this will turn to our mutual comfort, and to the glory of God. We cannot share these spiritual privileges, if we retain the love of sin in our hearts, though we refrain from the gross practice, Sin, regarded in the heart, will spoil the comfort and success of prayer; for the sacrifice of the wicked is an abomination of the Lord. But if the feeling of sin in the heart causes desires to be rid of it; if it be the presence of one urging a demand we know we must not, cannot comply with, this is an argument of sincerity. And when we pray in simplicity and godly sincerity, our prayers will be answered. This will excite gratitude to Him who hath not turned away our prayer nor his mercy from us. It was not prayer that fetched the deliverance, but his mercy that sent it. That is the foundation of our hopes, the fountain of our comforts; and ought to be the matter of our praises.