[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.