Though truth be naturally the object of man's understanding, to which it hath a certain inclination, and though it be a delightful thing to know the truth;[117] yet that which is saving meeteth with so much opposition in the flesh, and in the world, that while it is applauded in the general, it is resisted and rejected in particulars; and yet while the use of holy truth is hated and obstinately cast away, the name and the barren profession of it is made the matter of the glorying of hypocrites, and the occasion of reproaching dissenters as heretics, and the world is filled with bloody persecutions, and inhuman, implacable enmities and divisions, by a wonderful zeal for the name of truth, even by those men that will rather venture on damnation, than they will obey the truth which they so contend for. Multitudes of men have tormented or murdered others as heretics, who themselves must be tormented in hell for not being christians. It concerneth us therefore to deal very wisely and cautelously in this business.
_Direct._ I. Take heed lest there be any carnal interest or lust which maketh you unwilling to receive the truth, or inclineth you to error, that it may serve that interest or lust. It is no small number of men that are strangers or enemies to the truth, not because they cannot attain the knowledge of it, but because they would not have it to be truth. And men of great learning and natural parts are frequently thus deceived and led into error by a naughty, carnal, biassed heart; either because that error is the vulgar opinion, and necessary to maintain their popular reputation, and avoid reproach; or because it is the way of men in power, and necessary to their preferment and greatness in the world; or because the truth is contrary to their fleshly lusts and pleasures, or contrary to their honour and worldly interest, and would hazard their reputations or their lives. How loth is a sensual, ungodly man to believe that "without holiness none shall see God," and that he "that is in Christ is a new creature, and that if any man have not the Spirit of Christ, the same is none of his, and that if they live after the flesh they shall die!"[118] How loth is the ambitious minister to believe that the way of Christ's service lieth not in worldly pomp, or ease, or pleasures; but in taking up the cross and following Christ in self-denial, and in being as the servant of all, in the unwearied performance of careful oversight and compassionate exhortations unto all the flock! Let a controversy be raised about any of these points, and the mind of lazy, ambitious men doth presently fall in with that part which gratifieth their fleshly lusts, and excuseth them from that toilsome way of duty which they already hate. The secret lusts and vices of a false, hypocritical heart, are the commonest and the powerfulest arguments for error; and such men are glad, that great men or learned men will give so much ease to their consciences, and shelter to their reputations, as to countenance, or make a controversy at least of that which their lusts desire to be true. Above all therefore see that you come not to inquire after truth with an unsanctified heart, and unmortified lusts, which are a bias to your minds, and make you warp from the truth which you inquire after; for if the carnal mind neither is nor can be subject to the law of God, you may easily perceive that it will be loth to believe it; when in so doing they believe their own condemnation. An honest, sanctified heart is fittest to entertain the truth.
_Direct._ II. Seek after the truth for the love of truth, and love it especially for its special use, as it formeth the heart and life to the image and will of God; and not for the fanciful delight of knowing; much less for carnal, worldly ends.[119] No means are used at all as means, where the end is not first determined of. And to do the same thing materially to another end, is not indeed to do the same; for thereby it is made another thing. Your physician will come to you if you seek to him as a physician; but not if you send to him to mend your shoes. So if you seek knowledge for the true ends of knowledge, to fill your hearts with the love of God, and guide your lives in holiness and righteousness, God is engaged to help you in the search. But if you seek it only for to please your pride or fancy, no wonder if you miss of it; and it is no great matter whether you find it or not, for any good it is like to do you. Every truth of God is appointed to be his instrument, to do some holy work upon your heart: let the love of holiness be it that maketh you search after truth, and then you may expect that God should be your teacher.