Psalms 36:4

"He hath meditated iniquity on his bed." What said He, "On his bed?" (ver. 4). "The ungodly hath said in himself, that he will sin:" what above he said, in himself, that here he said, "On his bed." Our bed is our heart: there we suffer the tossing of an evil conscience; and there we rest when our conscience is good. Whoso loveth the bed of his heart, let him do some good therein. There is our bed, where the Lord Jesus Christ commands us to pray. "Enter into thy chamber, and shut thy door." What is, "Shut thy door?" Expect not from God such things as are without, but such as are within; "and thy Father which seeth in secret, shall reward thee openly." Who is he that shutteth not the door? He who asketh much from God such things, and in such wise directeth all his prayers, that he may receive the goods that are of this world. Thy door is open, the multitude seeth when thou prayest. What is it to shut thy door? To ask that of God, which God alone knoweth how He giveth. What is that for which thou prayest, when thou hast shut the door? What "eye hath not seen, nor ear heard, or hath entered into the heart of man." And haply it hath not entered into thy very bed, that is, into thy heart. But God knoweth what He will give: but when shall it be? When the Lord shall be revealed, when the Judge shall appear. ... "He hath set himself in every way that is not good." What is, "he hath set himself"? He hath sinned perseveringly. Whence also of a certain pious and good man it is said, "He hath not stood in the way of sinners." As this "hath not stood," so that "hath set himself." "But wickedness hath he not hated." There is the end, there the fruit: if a man cannot but have wickedness, let him at least hate it. For when thou hatest it, it scarcely occurs to thee to do any wickedness. For sin is in our mortal body, but what saith the Apostle? "Let not sin reign in your mortal body, that ye should obey it in the lusts thereof." When beginneth it not to be therein? When that shall be fulfilled in us which he saith, "When this corruptible shall have put on incorruption, and this mortal shall have put on immortality." Before this come to pass, there is a delighting in sin in the body, but greater is the delighting and the pleasure in the Word of Wisdom, in the Commandment of God. Overcome sin and the lust thereof. Sin and iniquity do thou hate, that thou mayest join thyself to God, who hateth it as well as thou. Now being joined in mind unto the Law of God, in mind thou servest the Law of God. And if in the flesh thou therefore servest the law of sin, because there are in thee certain carnal delightings, then will there be none when thou shalt no longer fight. It is one thing not to fight, and to be in true and lasting peace; another to fight and overcome; another to fight and to be overcome; another not to fight at all, but to be carried away. ...