1 Corinthians 14:5
“I would have you all speak with tongues, but rather that you should prophesy: for greater is he that prophesies than he that speaks with tongues, except he interpret, that the Church may receive edifying.”
But “rather” and “greater,” do not mark opposition, but superiority. So that hence also it is evident that he is not disparaging the gift, but leading them to better things, displaying both his carefulness on their behalf, and a spirit free from all envy. For neither did he say, “I would that two or three,” but, “that you all spoke with tongues” and not this only, but also, “that you prophesied;” and this rather than that; “for greater is he that prophesies.” For since he has established and proved it, he next proceeds also to assert it; not however simply, but with a qualification. Accordingly he adds, “except he interpret;” since if he be able to do this, I mean the interpreting, “he has become equal unto the prophet,” so he speaks, “because then there are many who reap the advantage of it;” a thing to be especially observed, how this throughout, before all else, is his object,
Source: Homilies on First Corinthians (New Advent)