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.
10. grace … given unto me—Paul puts this first, to guard against seeming to want humility, in pronouncing himself "a WISE master builder," in the clause following [Chrysostom]. The "grace" is that "given" to him in common with all Christians (1Co 3:5), only proportioned to the work which God had for him to do [Alford].
wise—that is, skilful. His skill is shown in his laying a foundation. The unskilful builder lays none (Lu 6:49). Christ is the foundation (1Co 3:11).
another—who ever comes after me. He does not name Apollos; for he speaks generally of all successors, whoever they be. His warning, "Let every man (every teacher) take heed how," &c., refers to other successors rather than Apollos, who doubtless did not, as they, build wood, hay, &c., on the foundation (compare 1Co 4:15). "I have done my part, let them who follow me see (so the Greek for 'take heed') to theirs" [Bengel].
how—with what material [Alford]. How far wisely, and in builder-like style (1Pe 4:11).
buildeth thereupon—Here the building or superstructure raised on Christ the "foundation," laid by Paul (1Co 2:2) is not, as in Eph 2:20, 21, the Christian Church made up of believers, the "lively stones" (1Pe 2:5), but the doctrinal and practical teaching which the teachers who succeeded Paul, superadded to his first teaching; not that they taught what was false, but their teaching was subtle and speculative reasoning, rather than solid and simple truth.