Proverbs 30:5

Is fire-tried; that is, most pure, like gold purified by fire. (Challoner) (Psalm xvii. 31., and Jeremias xxiii. 29.) — It cannot deceive.

III. To assure us of the truth of the word of God, and to recommend it to us, v. 5, 6. Agur's pupils expect to be instructed by him in the things of God. "Alas!" says he, "I cannot undertake to instruct you; go to the word of God; see what he has there revealed of himself, and of his mind and will; you need know no more than what that will teach you, and that you may rely upon as sure and sufficient. Every word of God is pure; there is not the least mixture of falsehood and corruption in it." The words of men are to be heard and read with jealousy and with allowance, but there is not the least ground to suspect any deficiency in the word of God; it is as silver purified seven times (Ps 12 6), without the least dross or alloy. Thy word is very pure, Ps 119 140. 1. It is sure, and therefore we must trust to it and venture our souls upon it. God in his word, God in his promise, is a shield, a sure protection, to all those that put themselves under his protection and put their trust in him. The word of God, applied by faith, will make us easy in the midst of the greatest dangers, Ps 46 1, 2. 2. It is sufficient, and therefore we must not add to it (v. 6): Add thou not unto his words, because they are pure and perfect. This forbids the advancing of any thing, not only in contradiction to the word of God, but in competition with it; though it be under the plausible pretence of explaining it, yet, if it pretend to be of equal authority with it, it is adding to his words, which is not only a reproach to them as insufficient, but opens a door to all manner of errors and corruptions; for, that one absurdity being granted, that the word of any man, or company of men, is to be received with the same faith and veneration as the word of God, a thousand follow. We must be content with what God has thought fit to make known to us of his mind, and not covet to be wise above what is written; for, (1.) God will resent it as a heinous affront: "He will reprove thee, will reckon with thee as a traitor against his crown and dignity, and lay thee under the heavy doom of those that add to his words, or diminish from them," Deut 4 2; 12 32. (2.) We shall run ourselves into endless mistakes: "Thou wilt be found a liar, a corrupter of the word of truth, a broacher of heresies, and guilty of the worst of forgeries, counterfeiting the broad seal of heaven, and pretending a divine mission and inspiration, when it is all a cheat. Men may be thus deceived, but God is not mocked."

Verses 1-6 Agur speaks of himself as wanting a righteousness, and having done very foolishly. And it becomes us all to have low thoughts of ourselves. He speaks of himself as wanting revelation to guide him in the ways of truth and wisdom. The more enlightened people are, the more they lament their ignorance; the more they pray for clearer, still clearer discoveries of God, and his rich grace in Christ Jesus. In ver. Verse 4 , there is a prophetic notice of Him who came down from heaven to be our Instructor and Saviour, and then ascended into heaven to be our Advocate. The Messiah is here spoken of as a Person distinct from the Father, but his name as yet secret. The great Redeemer, in the glories of his providence and grace, cannot be found out to perfection. Had it not been for Christ, the foundations of the earth had sunk under the load of the curse upon the ground, for man's sin. Who, and what is the mighty One that doeth all this? There is not the least ground to suspect anything wanting in the word of God; adding to his words opens the way to errors and corruptions.