1. There is a law in the minds of men which is a rule of good and evil. There is a notion of good and evil in the consciences of men, which is evident by those laws which are common in all countries, for the preserving human societies, the encouragement of virtue, and discouragement of vice; what standard should they have for those laws but a common reason? the design of those laws was to keep men within the bounds of goodness for mutual commerce, whence the apostle calls the heathen magistrate a “minister of God for good” (Rom. xiii. 4): and “the Gentiles do by nature the things contained in the law” (Rom. ii. 14).
Man in the first instant of the use of reason, finds natural principles within himself; directing and choosing them, he finds a distinction between good and evil; how could this be if there were not some rule in him to try and distinguish good and evil? If there was not such a law and rule in man, he could not sin; for where there is no law there is no transgression. If man were a law to himself, and his own will his law, there could be no such thing as evil; whatsoever he willed, would be good and agreeable to the law, and no action could be accounted sinful; the worst act would be as commendable as the best. Everything at man’s appointment would be good or evil. If there were no such law, how should men that are naturally inclined to evil disapprove of that which is unlovely, and approve of that good which they practise not? No man but inwardly thinks well of that which is good, while he neglects it; and thinks ill of that which is evil, while he commits it. Those that are vicious, do praise those that practise the contrary virtues. Those that are evil would seem to be good, and those that are blameworthy yet will rebuke evil in others. This is really to distinguish between good and evil; whence doth this arise, by what rule do we measure this, but by some innate principle? And this is universal, the same in one man as in another, the same in one nation as in another; they are born with every man, and inseparable from his nature (Prov. xxvii. 19): as in water, face answers to face, so the heart of man to man. Common reason supposeth that there is some hand which hath fixed this distinction in man; how could it else be universally impressed? No law can be without a lawgiver: no sparks but must be kindled, by some other. Whence should this law then derive its original? Not from man; he would fain blot it out, and cannot alter it when he pleases. Natural generation never intended it; it is settled therefore by some higher hand, which, as it imprinted it, so it maintains it against the violence of men, who, were it not for this law, would make the world more than it is, an aceldama and field of blood; for had there not been some supreme good, the measure of all other goodness in the world, we could not have had such a thing as good. The Scripture gives us an account that this good was distinguished from evil before man fell, they were objecta scibilia; good was commanded and evil prohibited, and did not depend upon man. From this a man may rationally be instructed that there is a God; for he may thus argue: I find myself naturally obliged to do this thing, and avoid that; I have, therefore, a superior that doth oblige me; I find something within me that directs me to such actions, contrary to my sensitive appetite; there must be something above me, therefore, that puts this principle into man’s nature; if there were no superior, I should be the supreme judge of good and evil; were I the lord of that law which doth oblige me, I should find no contradiction within myself, between reason and appetite.
2. From the transgression of this law of nature, fears do arise in the consciences of men. Have we not known or heard of men struck by so deep a dart, that could not be drawn out by the strength of men, or appeased by the pleasure of the world; and men crying out with horror, upon a death‑bed, of their past life, when “their fear hath come as a desolation, and destruction as a whirlwind?” (Prov. i. 27): and often in some sharp affliction, the dust hath been blown off from men’s consciences, which for a while hath obscured the writing of the law. If men stand in awe of punishment, there is then some superior to whom they are accountable; if there were no God, there were no punishment to fear. What reason of any fear, upon the dissolution of the knot between the soul and body, if there were not a God to punish, and the soul remained not in being to be punished? How suddenly will conscience work upon the appearance of an affliction, rouse itself from sleep like an armed man, and fly in a man’s face before he is aware of it! It will “surprise the hypocrites” (Isa. xxxviii. 14): it will bring to mind actions committed long ago, and set them in order before the face, as God’s deputy, acting by his authority and omniscience. As God hath not left himself without a witness among the creatures (Acts xiv. 17), so he hath not left himself without a witness in a man’s own breast.
(1.) This operation of conscience hath been universal. No nation hath been any more exempt from it than from reason; not a man but hath one time or other more or less smarted under the sting of it. All over the world conscience hath shot its darts; it hath torn the hearts of princes in the midst of their pleasures; it hath not flattered them whom most men flatter; nor feared to disturb their rest, whom no man dares to provoke. Judges have trembled on a tribunal, when innocents have rejoiced in their condemnation. The iron bars upon Pharaoh’s conscience, were at last broke up, and he acknowledged the justice of God in all that he did, (Exod. ix. 27): “I have sinned, the Lord is righteous, and I and my people are wicked.” Had they been like childish frights at the apprehension of bugbears, why hath not reason shaken them off? But, on the contrary, the stronger reason grows, the smarter those lashes are; groundless fears had been short‑lived, age and judgment would have worn them off, but they grow sharper with the growth of persons. The Scripture informs us they have been of as ancient a date as the revolt of the first man, (Gen. iii. 10): “I was afraid,” saith Adam, “because I was naked;” which was an expectation of the judgment of God. All his posterity inherit his fears, when God expresseth himself in any tokens of his majesty and providence in the world. Every man’s conscience testifies that he is unlike what he ought to be, according to that law engraven upon his heart. In some, indeed, conscience may be seared or dimmer; or suppose some men may be devoid of conscience, shall it be denied to be a thing belonging to the nature of man? Some men have not their eyes, yet the power of seeing the light is natural to man, and belongs to the integrity of the body. Who would argue that, because some men are mad, and have lost their reason by a distemper of the brain, that therefore reason hath no reality, but is an imaginary thing? But I think it is a standing truth that every man hath been under the scourge of it, one time or other, in a less or a greater degree; for, since every man is an offender, it cannot be imagined, conscience, which is natural to man, and an active faculty, should always lie idle, without doing this part of its office. The apostle tells us of the thoughts accusing or excusing one another, (or by turns), according as the actions were. Nor is this truth weakened by the corruptions in the world, whereby many have thought themselves bound in conscience to adhere to a false and superstitious worship and idolatry, as much as any have thought themselves bound to adhere to a worship commanded by God. This very thing infers that all men have a reflecting principle in them; it is no argument against the being of conscience, but only infers that it may err in the application of what it naturally owns. We can no more say, that because some men walk by a false rule, there is no such thing as conscience, than we can say that because men have errors in their minds, therefore they have no such faculty as an understanding; or because men will that which is evil, they have no such faculty as a will in them.
(2.) These operations of conscience are when the wickedness is most secret. These tormenting fears of vengeance have been frequent in men, who have had no reason to fear man, since their wickedness being unknown to any but themselves, they could have no accuser but themselves. They have been in many acts which their companions have justified them in; persons above the stroke of human laws, yea, such as the people have honored as gods, have been haunted by them. Conscience hath not been frighted by the power of princes, or bribed by the pleasures of courts. David was pursued by his horrors, when he was, by reason of his dignity, above the punishment of the law, or, at least, was not