{6} Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;

(6) Thirdly he shows that they must take heed that the upper part of the building is answerable to the foundation. That is that admonitions, exhortations, and whatever pertains to the edifying of the flock, is answerable to the doctrine of Christ, in the matter as well as in form. This doctrine is compared to gold, silver, and precious stones: of which material Isaiah also and John in the Revelation build the heavenly city. And to these are the opposites, wood, hay, stubble, that is to say, curious and vain questions or decrees: and to be short, all the type of teaching which serves to vain show. For false doctrines, of which he does not speak here, are not correctly said to be built upon this foundation, unless perhaps in show only.

People's New Testament

3:12 If any man buildeth upon this foundation. There is only one foundation for all builders to build upon. The church or temple will be of the character of the material built upon it.

Gold, silver, precious stones. If this material be precious and imperishable, if apostolic doctrines and men molded into the image of Christ be this material, it is well.

Wood, hay, stubble. If erroneous doctrines and unstable men, this will all be revealed in due time.

Wesley's Notes

3:12 If any one build gold, silver, costly stones - Three sorts of materials which will bear the fire; true and solid doctrines. Wood, hay, stubble - Three which will not bear the fire. Such are all doctrines, ceremonies, and forms of human invention; all but the substantial, vital truths of Christianity.

Jamieson-Fausset-Brown Bible Commentary

12. Now-rather, "But." The image is that of a building on a solid foundation, and partly composed of durable and precious, partly of perishable, materials. The "gold, silver, precious stones," which all can withstand fire (Re 21:18, 19), are teachings that will stand the fiery test of judgment; "wood, hay, stubble," are those which cannot stand it; not positive heresy, for that would destroy the foundation, but teaching mixed up with human philosophy and Judaism, curious rather than useful. Besides the teachings, the superstructure represents also the persons cemented to the Church by them, the reality of whose conversion, through the teachers' instrumentality, will be tested at the last day. Where there is the least grain of real gold of faith, it shall never be lost (1Pe 1:7; compare 1Co 4:12). On the other hand, the lightest straw feeds the fire [Bengel] (Mt 5:19).

Matthew Henry's Concise Commentary

3:10-15 The apostle was a wise master-builder; but the grace of God made him such. Spiritual pride is abominable; it is using the greatest favours of God, to feed our own vanity, and make idols of ourselves. But let every man take heed; there may be bad building on a good foundation. Nothing must be laid upon it, but what the foundation will bear, and what is of a piece with it. Let us not dare to join a merely human or a carnal life with a Divine faith, the corruption of sin with the profession of Christianity. Christ is a firm, abiding, and immovable Rock of ages, every way able to bear all the weight that God himself or the sinner can lay upon him; neither is there salvation in any other. Leave out the doctrine of his atonement, and there is no foundation for our hopes. But of those who rest on this foundation, there are two sorts. Some hold nothing but the truth as it is in Jesus, and preach nothing else. Others build on the good foundation what will not abide the test, when the day of trail comes. We may be mistaken in ourselves and others; but there is a day coming that will show our actions in the true light, without covering or disguise. Those who spread true and pure religion in all its branches, and whose work will abide in the great day, shall receive a reward. And how great! how much exceeding their deserts! There are others, whose corrupt opinions and doctrines, or vain inventions and usages in the worship of God, shall be made known, disowned, and rejected, in that day. This is plainly meant of a figurative fire, not of a real one; for what real fire can consume religious rites or doctrines? And it is to try every man's works, those of Paul and Apollos, as well as others. Let us consider the tendency of our undertakings, compare them with God's word, and judge ourselves, that we be not judged of the Lord.