If any man think himself to be a prophet, or {u} spiritual, let him acknowledge that the things that I write unto you are the commandments of the Lord.

(u) Skilful in knowing and judging spiritual things.

People's New Testament

14:37 If any man think himself to be a prophet, or spiritual. If any one thinks he is inspired, or has spiritual gifts,

let him acknowledge... the commandments of the Lord. One proof of it is that he recognizes what I write as the Lord's commandment. This is always a test. Whoever insists that he has the spirit, and sets aside the New Testament commands is self-convicted.

Wesley's Notes

14:37 Or spiritual - Endowed with any extraordinary gift of the Spirit. Let him - Prove it, by acknowledging that I now write by the Spirit.

Jamieson-Fausset-Brown Bible Commentary

37. prophet-the species.

spiritual-the genus: spiritually endowed. The followers of Apollos prided themselves as "spiritual" (1Co 3:1-3; compare Ga 6:1). Here one capable of discerning spirits is specially meant.

things that I write . commandments of the Lord-a direct assertion of inspiration. Paul's words as an apostle are Christ's words. Paul appeals not merely to one or two, but to a body of men, for the reality of three facts about which no body of men could possibly be mistaken: (1) that his having converted them was not due to mere eloquence, but to the "demonstration of the Spirit and of power"; (2) that part of this demonstration consisted in the communication of miraculous power, which they were then exercising so generally as to require to be corrected in the irregular employment of it; (3) that among these miraculous gifts was one which enabled the "prophet" or "spiritual person" to decide whether Paul's Epistle was Scripture or not. He could not have written so, unless the facts were notoriously true: for he takes them for granted, as consciously known by the whole body of men whom he addresses [Hinds, On Inspiration].

Matthew Henry's Concise Commentary

14:34-40 When the apostle exhorts Christian women to seek information on religious subjects from their husbands at home, it shows that believing families ought to assemble for promoting spiritual knowledge. The Spirit of Christ can never contradict itself; and if their revelations are against those of the apostle, they do not come from the same Spirit. The way to keep peace, truth, and order in the church, is to seek that which is good for it, to bear with that which is not hurtful to its welfare, and to keep up good behaviour, order, and decency.