1Co 14:22. Εἰς σημεῖον) for a sign, by which unbelievers may be allured and hear [give ear to] the word; but οὐδʼ οὕτως, not even thus do they hear [alluding to Isa 28:12, see last note].-εἰσὶν, have their existence) The accent has the effect of making the word emphatic.-ἡ δὲ προφητεία, but prophecy) namely, is for a sign, or simply is; comp. 1Co 6:3.-τοῖς πιστεύουσιν, to them that believe) This must be taken as an instance of the figure Amplificatio; inasmuch as prophecy makes believers of unbelievers; the speaking tongue leaves the unbeliever to himself [still an unbeliever]. The expression of Paul is indefinite. Unbelievers, generally, when tongues fall upon them, continue to be unbelievers, but prophecy makes believers of unbelievers, and gives spiritual nourishment to them, that believe.
 See Append. The taking of the denomination of a thing, not so much from what it now is, as from what it is about to be. As here, “Prophecy is a sign to those who thereby are made believers.” This seems Bengel’s meaning.-ED.