_Answ._ You must avoid the sin, by changing your judgment, and not by obeying it; for that is but to avoid one sin by committing another. An erring judgment is neither obeyed nor disobeyed without sin; it can make you sin, though it cannot make you duty; it doth insnare, though not oblige. If you follow it, you break the law of God in doing that which he forbids you. If you forsake it and go against it, you reject the authority of God, in doing that which you think he forbids you. So that there is no attaining to innocence any other way, but by coming first to know your duty, and then to do it. If you command your servant to weed your corn, and he mistake you, and verily think, that you bid him pull up the corn, and not the weeds; what now should he do? Shall he follow his judgment, or go against it? Neither, but change it, and then follow it; and to that end inquire further of your mind, till he be better informed: and no way else will serve the turn.
_Quest._ VI. Seeing no man that erreth doth know or think that he erreth, (for that is a contradiction,) how can I lay by that opinion, or strive against it, which I take to be the truth?
_Answ._ It is your sin, that you take a falsehood to be a truth. God hath appointed means for the cure of blindness and error, as well as other sins; or else the world were in a miserable case. Come into the light, with due self-suspicion, and impartiality, and diligently use all God's means, and avoid the causes of deceit and error, and the light of truth will at once show you the truth, and show you that before you erred. In the mean time sin will be sin, though you take it to be duty, or no sin.
_Quest._ VII. But seeing he that knoweth his master's will and doth it not, shall be beaten with many stripes; and he that knoweth it not, with few; is it not my duty chiefly to avoid the many stripes, by avoiding sinning against my conscience or knowledge?
_Answ._ 1. Your duty is to avoid both; and if both were not sinful, they would not both be punished with stripes. 2. Your conscience is not your knowledge when you err, but your ignorance. Conscience, as it signifieth the faculty of knowing, may be said to be conscience when it erreth; as reason is reason, in the faculty, when we err. And conscience, as to an erring act, may be called conscience, so far as there is any true knowledge in the act: as a man is said to see, when he misjudgeth of colours, or to reason, when he argueth amiss. But, so far as it erreth, it is no conscience in act at all; for conscience is science, and not nescience. You sin against your knowledge when you sin against a well-informed conscience, but you sin in ignorance when you sin against an erring conscience. 3. And if the question be not, what is your duty, but, which is the smaller sin, then it is true, that, _cæteris paribus_, it is a greater sin to go against your judgment, than to follow it. But yet, other imparities in matter and circumstances may be an exception against this rule.
_Quest._ VIII. But it is not possible for every man presently to know all his duty, and to avoid all error about his duty. Knowledge must be got in time. All men are ignorant in many things: should I not then in the mean time follow my conscience?
_Answ._ 1. Your ignorance is culpable, or not culpable. If it be not culpable, the thing which you are ignorant of is not your duty. If culpable, (which is the case supposed,) as you brought yourself to that difficulty of knowing, so it will remain your sin till it be cured; and one sin will not warrant another. And all that time you are under a double command; the one is, to know, and use the means of knowledge; and the other is, to do the thing commanded. So that how long soever you remain in error you remain in sin, and are not under an obligation to follow your error, but first to know, and then to do the contrary duty. 2. And as long as you keep yourselves in a necessity, or way of sinning, you must call it sin as it is, and not call it duty. It is not your duty to choose a lesser sin before a greater; but to refuse and avoid both the lesser and the greater. And if you say you cannot, yet, remember, that it is only your sin that is your impotency, or your impotency is sinful. But it is true, that you are most obliged to avoid the greatest sin: therefore, all that remaineth in the resolving of all such cases, is but to know, of two sins, which is the greatest.
_Quest._ IX. What if there be a great duty, which I cannot perform without committing a little sin? or, a very great good, which I cannot do but by an unlawful means; as, to save the lives of many by a lie?