(1.) Of being hardened by the deceitfulness. This the apostle charges on the Hebrews,
in the evil of thy heart that doth remain, than there would be in so much sin if thou hadst no grace at all. Observe,--
(2.) That as God sees abundance of beauty and excellency in the desires of the heart of his servants, more than in any the most glorious works of other men, yea, more than in most of their own outward performances, which have a greater mixture of sin than the desires and pantings of grace in the heart have; so God sees a great deal of evil in the working of lust in their hearts, yea, and more than in the open, notorious acts of wicked men, or in many outward sins whereinto the saints may fall, seeing against them there is more opposition made, and more humiliation generally follows them. Thus Christ, dealing with his decaying children, goes to the root with them, lays aside their profession: Rev. 3:15, "I know thee;" -- "Thou are quite another thing than thou professest; and this makes thee abominable."
So, then, let these things, and the like considerations, lead thee to a clear sense of the guilt of thy indwelling lust, that there may be no room in thy heart for extenuating or excusing thoughts, whereby sin insensibly will get strength and prevail.
2. Consider the danger of it, which is manifold:--
(1.) Of being hardened by the deceitfulness. This the apostle charges on the Hebrews, chap. 3:12,13,"Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. But exhort one another daily, while it is called To-day; lest any of you be hardened through the deceitfulness of sin." "Take heed," saith he, "us all means, consider your temptations, watch diligently; there is a treachery, a deceit in sin, that tends to the hardening of your hearts from the fear of God." The hardening here mentioned is to the utmost, -- utter obduration; sin tends to it, and every distemper and lust will make at least some progress towards it. Thou that was tender, and didst use to melt under the word, under afflictions, wilt grow a some have profanely spoken, "sermon-proof and sickness-proof." Thou that didst tremble at the presence of God, thoughts of death, and appearance before him, when thou hadst more assurance of his love than now thou hast, shalt not be at all concerned, but shalt be able to pass over duties, praying, hearing, reading, and thy heart not in the least affected. Sin will grow a light thing to thee; thou wilt pass it by as a thing of nought; this it will grow to. And what will be the end of such a condition? Can a sadder thing befall thee? Is it not enough to make any heart to tremble, to think of being brought into that estate wherein he should have slight thoughts of sin? Slight thoughts of grace, of mercy, of the blood of Christ, of the law, heaven, and hell, come all in at the same season. Take heed, this is that thy lust is working towards, -- the hardening of the heart, searing of the conscience, blinding of the mind, stupifying of the affections, and deceiving of the whole soul.
(2.) The danger of some great temporal correction, which the Scripture calls "vengeance," "judgement," and "punishment." Ps. 89:30-33, Though God should not utterly cast thee off for this abomination that lies in thy heart, yet he will visit thee with the rod; though he pardon and forgive, he will take vengeance of thy inventions. O remember David and all his troubles! look on him flying into the wilderness, and
consider the hand of God upon him. Is it nothing to thee that God should kill thy child in anger, ruin thy estate in anger, break thy bones in anger, suffer thee to be a scandal and a reproach in anger, kill thee, destroy thee, make thee lie down in darkness, in anger? Is it nothing that he should punish, ruin, and undo others for thy sake? Let me not be mistaken. I do not mean that God doth send all these things always on his in anger; God forbid! but this I say, that when he doth so deal with thee, and thy conscience bears witness with him what thy provocations have been, thou wilt find his dealings full of bitterness to thy soul. If thou fearest not these things, I fear thou art under hardness.
(3.) Loss of peace and strength all a man's days. To have peace with God, to have strength to walk before God, is the sum of the great promises of the covenant of grace. In these things is the life of our souls. Without them in some comfortable measure, to live is to die. What good will our lives do us if we see not the face of God sometimes in peace? if we have not some strength to walk with him? Now, both these will an unmortified lust certainly deprive the souls of men of. This case is so evident in David, as that nothing can be more clear. How often doth he complain that his bones were broken, his soul disquieted, his wounds grievous, on this account! Take other instances: Isa. 57:17, "For the iniquity of his covetousness I was wroth, and hid myself." What peace, I pray, is there to a soul while God hides himself, or strength whilst he smites? Hos. 5:15, "I will go and return to my place, till they acknowledge their offence, and seek my face;" -- "I will leave them, hide my face, and what will become of their peace and strength?" If ever, then, thou hast enjoyed peace with God, if ever his terrors have made thee afraid, if ever thou hast had strength to walk with him, or ever hast mourned in thy prayer, and been troubled because of thy weakness, think of this danger that hangs over thy head. It is perhaps but a little while and thou shalt see the face of God in peace no more. Perhaps by to-morrow thou shalt not be able to pray, read, hear, or perform any duties with the least cheerfulness, life, or vigour; and thou mayst carry about thee broken bones, full of pain and terror, all the days of thy life. Yea, perhaps God will shoot his arrows at thee, and fill thee with anguish and disquietness, with fears and perplexities; make thee a terror and an astonishment to thyself and others; show thee hell and wrath every moment; frighten and scare thee with sad apprehensions of his hatred; so that thy sore shall run in the night season, and thy soul shall refuse comfort; so that thou shalt wish death rather than life, yea, thy soul may choose strangling. Consider this a little, -- though God should not utterly destroy thee, yet he might cast thee into this condition, wherein thou shalt have quick and living apprehensions of thy destruction. Wont thy heart to thoughts hereof; let it know what is like to be the issue of the state. Leave not this consideration until thou hast made thy soul to tremble within thee.
(4.) There is the danger of eternal destruction. For the due management of this consideration, observe, --
[1.] That there is such a connection between a continuance in sin and eternal destruction, that though God does resolve to deliver some from a continuance in sin that they may not be destroyed, yet he will deliver none from destruction that continue in sin; so that whilst any one lies under an abiding power of sin, the threats of destruction and everlasting separation from God are to be held out to him. So Heb. 3:12; to which add chap. 10:38.