Adam Clarke on 1 Corinthians 14:39

Covet to prophesy - Let it be your endeavor and prayer to be able to teach the way of God to the ignorant; this is the most valuable, because the most useful gift of the Spirit.

And forbid not to speak with tongues - Let every gift have its own place and operation; let none envy another; nor prevent him from doing that part of the work to which God, by giving the qualification, has evidently called him.