Charles Spurgeon Commentary Romans 12:6-8

"And having gifts differing according to the grace that was given to us, whether prophecy, [let us prophesy] according to the proportion of our faith; or ministry, [let us give ourselves] to our ministry; or he that teacheth, to his teaching; or he that exhorteth, to his exhorting: he that giveth, [let him do it] with liberality; he that ruleth, with diligence; he that showeth mercy, with cheerfulness." — Romans 12:6-8 (ASV)

Having then gifts differing according to the grace that is given to us, whether prophecy, let us prophesy according to the proportion of faith; Or ministry, let us wait on our ministering: or he that teacheth, on teaching; Or he that exhorteth, on exhortation:

Keep to your own work; stand in your own niche. If you are only an exhorter, do not pretend to teach. If your work is ministry, and you cannot prophesy, do not attempt to do it. Every man in his own order.