1Cor 14:4

“What then? Did they edify no man? "Yes," saith he, "themselves alone:" wherefore also he adds, "He that speaketh in tongue edifieth himself." And how, if he know not what he saith? Why, for the present, he is speaking of them who understand what they say; understand it themselves, but know not how to render it unto others. "But he that prophesieth edifieth the Church." Now as great as is the difference between a single person and the Church, so great is the interval between these two. Seest thou his wisdom, how he doth not thrust out the gift and make nothing of it, but signifies it to have some advantage, small though it be, and such as to suffice the possessor only?”

“He that speaketh its an unknown tongue,.... Be it the Hebrew language, or any other; some copies, and the Ethiopic version, read, "with tongues": edifieth himself; his heart may be warmed, his affections raised, his devotion kept up, and he be in a very spiritual and comfortable frame, knowing and understanding what he himself says: but he that prophesieth, edifieth the church: which is the great end of the Gospel ministry, which is for the edifying the body of the church: wherefore that which tends to the edification of more, even the whole church, must be preferable to that, which at most can only edify one, and that the speaker himself.”

“He that speaketh in an unknown tongue - In the Hebrew for instance, the knowledge of the depth and power of which he has got by a Divine revelation, edifieth himself by that knowledge. But he that prophesieth - Has the gift of preaching. Edifieth the Church - Speaketh unto men to edification, exhortation, and comfort, Co1 14:3.”