Here, I. Paul blames the Corinthians for their weakness and nonproficiency. Those who are sanctified are so only in part: there is still room for growth and increase both in grace and knowledge, 2 Pet. 3:18. Those who through divine grace are renewed to a spiritual life may yet in many things be defective. The apostle tells them he could not speak to them as unto spiritual men, but as unto carnal men, as to babes in Christ, 1 Cor. 3:1. They were so far from forming their maxims and measures upon the ground of divine revelation, and entering into the spirit of the gospel, that is was but too evident they were much under the command of carnal and corrupt affections. They were still mere babes in Christ. They had received some of the first principles of Christianity, but had not grown up to maturity of understanding in them, or of faith and holiness; and yet it is plain, from several passages in this epistle, that the Corinthians were very proud of their wisdom and knowledge. Note, It is but too common for persons of very moderate knowledge and understanding to have a great measure of self-conceit. The apostle assigns their little proficiency in the knowledge of Christianity as a reason why he had communicated no more of the deep things of it to them. They could not bear such food, they needed to be fed with milk, not with meat, 1 Cor. 3:2. Note, It is the duty of a faithful minister of Christ to consult the capacities of his hearers and teach them as they can bear. And yet it is natural for babes to grow up to men; and babes in Christ should endeavour to grow in Stature, and become men in Christ. It is expected that their advances in knowledge should be in proportion to their means and opportunities, and their time of professing religion, that they may be able to bear discourses on the mysteries of our religion, and not always rest in plain things. It was a reproach to the Corinthians that they had so long sat under the ministry of Paul and had made no more improvement in Christian knowledge. Note, Christians are utterly to blame who do not endeavour to grow in grace and knowledge.
II. He blames them for their carnality, and mentions their contention and discord about their ministers as evidence of it: For you are yet carnal; for whereas there are among you envyings, and strifes, and divisions, are you not carnal, and walk as men? 1 Cor. 3:3. They had mutual emulations, and quarrels, and factions among them, upon the account of their ministers, while one said, I am of Paul; and another, I am of Apollos, 1 Cor. 3:4. These were proofs of their being carnal, that fleshly interests and affections too much swayed them. Note, Contentions and quarrels about religion are sad evidences of remaining carnality. True religion makes men peaceable and not contentious. Factious spirits act upon human principles, not upon principles of true religion; they are guided by their own pride and passions, and not by the rules of Christianity: Do you not walk as men? Note, It is to be lamented that many who should walk as Christians, that is, above the common rate of men, do indeed walk as men, live and act too much like other men.