SECT. III.

The usefulness and necessity of the knowledge of divine truths.

There is no other way by which any means of grace whatsoever can be of any benefit, but by knowledge. All teaching is in vain, without learning. Therefore the preaching of the gospel would be wholly to no purpose, if it conveyed no knowledge to the mind. There is an order of men which Christ has appointed on purpose to be teachers in his church. But they teach in vain, if no knowledge in these things is gained by their teaching. It is impossible that their teaching and preaching should be a mean of grace, or of any good in the hearts of their hearers, any otherwise than by knowledge imparted to the understanding. Otherwise it would be of as much benefit to the auditory, if the minister should preach in some unknown tongue. All the difference is, that preaching in a known tongue conveys something to the understanding, which preaching in an unknown tongue doth not. On this account, such preaching must be unprofitable. In such things men receive nothing, when they understand nothing; and are not at all edified, unless some knowledge be conveyed; agreeable to the apostle’s arguing, 1 Cor. xiv. 2-6.

No speech can be a mean of grace, but by conveying knowledge. Otherwise the speech is as much lost as if there had been no man there, and if he that spoke, had spoken only into the air; as it follows in the passage just quoted, ver. 6-10. God deals with man as with a rational creature; and when faith is in exercise, it is not about something he knows not what. Therefore hearing is absolutely necessary to faith; because hearing is necessary to understanding, Rom x. 14.“How shall they believe in him of whom they have not heard?” In like manner, there can be no love without knowledge. It is not according to the nature of the human soul, to love an object which is entirely unknown. The heart cannot be set upon an object of which there is no idea in the understanding. The reasons which induce the soul to love, must first be understood, before they can have a reasonable influence on the heart.

God hath given us the Bible, which is a book of instructions. But this book can be of no manner of profit to us, any otherwise than as it conveys some knowledge to the mind: it can profit us no more than if it were written in the Chinese or Tartarian language, of which we know not one word. So the sacraments of the gospel can have a proper effect no other way, than by conveying some knowledge. They represent certain things by visible signs. And what is the end of signs, but to convey some knowledge of the things signified? Such is the nature of man, that no object can come at the heart but through the door of the understanding: and there can be no spiritual knowledge of that of which there is not first a rational knowledge. It is impossible that any one should see the truth or excellency of any doctrine of the gospel, who knows not what that doctrine is. A man cannot see the wonderful excellency and love of Christ in doing such and such things for sinners, unless his understanding be first informed how those things were done. He cannot have a taste of the sweetness and excellency of divine truth, unless he first have a notion that there is such a thing.

Without knowledge in divinity, none would differ from the most ignorant and barbarous heathens. The heathens159 remain in gross darkness, because they are not instructed, and have not obtained the knowledge of divine truths.

If men have no knowledge of these things, the faculty of reason in him will be wholly in vain. The faculty of reason and understanding was given for actual understanding and knowledge. If a man have no actual knowledge, the faculty or capacity of knowing is of no use to him. And if he have actual knowledge, yet if he be destitute of the knowledge of those things which are the last end of his being, and for the sake of the knowledge of which he had more understanding given him than the beasts; then still his faculty of reason is in vain; he might as well have been a beast as a man. But divine subjects are the things, to know which we had the faculty of reason given us. They are the things which appertain to the end of our being, and to the great business for which we are made. Therefore a man cannot have his faculty of understanding to any good purpose, further than he hath knowledge of divine truth.

So that this kind of knowledge is absolutely necessary.—Other kinds of knowledge may be very useful. Some other sciences, such as astronomy, natural philosophy, and geography, may be very excellent in their kind. But the knowledge of this divine science is infinitely more useful and important than that of all other sciences whatever.