[6] brethren, if I come unto speaking with tongues, what shall I profit I shall speak either by revelation, or by knowledge, or by prophesying, or by doctrine? [7] And even things without life giving sound, whether pipe or harp, they give a distinction in the sounds, how shall it be known what is piped or harped? [8] For if the trumpet give an uncertain sound, who shall prepare himself to the battle? [9] So likewise ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for speak into the air. [10] it may be, so many kinds of voices in the world, and none of them is without signification. [11] Therefore I know the meaning of the voice, unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto [12] Even so forasmuch as zealous of spiritual gifts, seek that ye may excel to the edifying of the church. [13] let him that speaketh in an unknown tongue pray that he may interpret. [14] For if I pray in an unknown tongue, spirit prayeth, but understanding unfruitful. [15] What then? I will pray with the spirit, and I will pray with the understanding also: I will sing with the spirit, and I will sing with the understanding also. [16] Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest? [17] For thou verily givest thanks well, but the other not edified. [18] I thank God, I speak with tongues more than all: [19] Yet in the church I had rather speak five words understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.