The reading is from St. Paul's First Letter to the Corinthians 13:11-14; 14:1-5

BRETHREN, when I was a child, I spoke like a child, I thought like a child, I reasoned like a child; when I became a man, I gave up childish ways. For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall understand fully, even as I have been fully understood. So faith, hope, love abide, these three; but the greatest of these is love. Make love your aim, and earnestly desire the spiritual gifts, especially that you may prophesy. For one who speaks in a tongue speaks not to men but to God; for no one understands him, but he utters mysteries in the Spirit. On the other hand, he who prophesies speaks to men for their upbuilding and encouragement and consolation. He who speaks in a tongue edifies himself, but he who prophesies edifies the church. Now I want you all to speak in tongues, but even more to prophesy. He who prophesies is greater than he who speaks in tongues, unless some one interprets, so that the church may be edified.