What people think is true is often far from the way things really are. We need to stay in the habit of assuming that God has great plans even for those brothers and sisters in Christ who do not impress us very much. We want to make these positive assumptions about our mighty God because it's foolish not to.
[Proverbs 18:2] A fool does not delight in understanding, but only in airing his opinions. If it is you who has convinced yourself that God will never do much through you, then please stop doing this, starting right now. It's never God who whispers in your ear, “I'm keeping you on the bench.”