Clement of Alexandria : You see that the barbarian philosophy professes deeds, not words. The apostle thus speaks: "So likewise ye, except ye utter by the tongue a word easy to be understood, how shall ye know what is spoken? for ye shall speak into the air. There are, it may be, so many kind of voices in the world, and none of them is without signification. Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me." And, "Let him that speaketh in an unknown tongue pray that he may interpret." — The Stromata Book 1 John Chrysostom : "Wherefore let him that speaketh in a tongue pray that he may interpret." Here he shows that it is in their power to obtain the gift. For, "let him pray," saith he, i.e., "let him contribute his own part," since if thou ask diligently, thou wilt surely receive. Ask accordingly not to have the gift of tongue only, but also of interpretation, that thou mayest become useful unto all, and not shut up thy gift in thyself alone. — Homily on 1 Corinthians 35 Origen of Alexandria : If the one who speaks in tongues does not have the power to interpret them, others will not understand, but he will know what he was moved by the Spirit to say. When this is understood by others as well, there will be fruit from it. Here as elsewhere, we are taught to seek the common good of the church. — COMMENTARY ON 1 CORINTHIANS 4.61-62