In Psalm 40, David provides a simple guide for exponential Christian growth: Patience.

More even than patience, we have to learn to lean on Him, to call out to Him. To allow him to work, to recognize and never lose what he has done for us. To see how we need him, how lost we were without him. To daily acknowledge that we have to give him our hearts, but even if our hearts are in the right place...

It still takes time. So let's learn some patience.