Romans 12:1, 6

And so, dear brothers and sisters, I plead with you to give your bodies to God because of all he has done for you. Let them be a living and holy sacrifice—the kind he will find acceptable. This is truly the way to worship him.

In his grace, God has given us different gifts for doing certain things well. So if God has given you the ability to prophesy, speak out with as much faith as God has given you.