Third. Again, though a man doth not covet, steal, murder, worship gods of wood and stone, etc., if he does take the Lord's name in vain, he is forever gone, living and dying under that covenant. "Thou shalt not take the name of the LORD thy God in vain"; there is the command. But what if we do? Then he said, "The LORD will not hold him guiltless that take His name in vain." No; though thou live as holy as ever thou can't, and walk as circumspectly as ever any did, yet if thou dost take the Lord's name in vain, thou art gone by that covenant: "For I will not," mark "I will not," let him be in never so much danger, "I will not hold him guiltless that take My name in vain" (Exo 20:7). And so likewise for any other of the ten, do but break them, and thy state is irrecoverable if thou live and die under that covenant.
Fourth. Though thou shouldest fulfill this covenant or law, even all of it, for a long time, ten, twenty, forty, fifty, or threescore years, yet if thou do chance to slip and break one of them but once before thou die, thou art also gone and lost by that covenant; for mark, "Cursed is every one that continueth not in all things," that continue not in ALL things, mark that, "which are written in the book of the law to do them." But if a man doth keep all the Law of God his whole lifetime and only sin once before he dies, that one sin is a breach of the law, and he hath not continued doing the things contained therein. For, so to continue, according to the sense of this Scripture, is to hold on without any failing, either in thought, word, or deed; therefore, I say, though a man doth walk up to the law all his lifetime, only at the very last sin one time before he dies, he is sure to perish forever, dying under that covenant. For, my friends, you must understand that the Law of God is "yea," as well as the Gospel; and as they that are under the Covenant of Grace shall indeed be saved by it, so, even so, they that are under the Covenant of Works and the law, they shall surely be damned by it, if continuing there. This is the Covenant of Works and the nature of it—namely, not to abate anything, no, not a mite, to him that lives and dies under it: "I tell thee," saith Christ, "thou shalt not depart thence," that is, from under the curse, "till thou hast paid the very last mite" (Luke 12:59).
Fifth. Again, you must consider that this law doth not only condemn words and actions, as I said before, but it hath authority to condemn the most secret thoughts of the heart, being evil; so that if thou do not speak any evil word, as swearing, lying, jesting, dissembling, or any other word that tendeth to, or savoureth of sin, yet if there should chance to pass but one vain thought through thy heart but once in all thy lifetime, the law taketh hold of it, accuseth, and also will condemn thee for it. You may see one instance for all in (Matt 5:27,28) where Christ said that though a man does not lie with a woman carnally, yet if he does but look on her, and in his heart lust after her, he is counted by the law, being rightly expounded, such a one that hath committed the sin, and thereby had laid himself under the condemnation of the law. And so likewise of all the rest of the commands; if there be any evil thought do but pass through thy heart, whether it be against God or against man in the least measure, though possibly not discerned of thee, or by thee, yet the law takes hold of thee therefore. Does by its authority cast, condemn, and execute thee for thy so doing. "The thought of foolishness is sin" (Prov 24:9).
Sixth. Again, the law is of that nature and severity, that it doth not only inquire into the generality of thy life as touching several things, whether thou art upright there or no; but the law doth also follow thee into all thy holy duties, and watched over thee there, to see whether thou does do all things aright there—that is to say, whether when thou does pray thy heart hath no wandering thoughts in it; whether thou do every holy duty thou does perfectly without the least mixture of sin; and if it does find thee to slip, or in the least measure to fail in any holy duty that thou dost perform, the law taketh hold on that, and find fault with that, to render all the holy duties that ever thou didst unavailable because of that. I say, if, when thou art a hearing, there is but one vain thought, or in praying, but one vain thought, or in any other thing whatsoever, let it be civil or spiritual, one vain thought once in all thy lifetime will cause the law to take such hold on it, that for that one thing it doth even set open all the floodgates of God's wrath against thee, and irrecoverably by that covenant it doth bring eternal vengeance upon thee; so that, I say, look which ways thou wilt, and fail wherein thou wilt, and do it as seldom as ever thou canst, either in civil or spiritual things, as aforesaid—that is, either in the service of God, or in thy employments in the world, as thy trade or calling, either in buying or selling any way, in anything whatsoever; I say, if in any particular it find thee tardy, or in the least measure guilty, it call thee an offender, it accused thee to God, it puts a stop to all the promises thereof that are joined to the law, and leaves thee there as a cursed transgressor against God, and a destroyer of thy own soul.