Motivation is lightning to me. I draw to people and places and events which inspire. Such is the nature of the Holy Spirit (inspiring) and our spirits super-naturally draw there. Does not Hebrews 10:24-25 call us to assemble to motivate? Such is the gathering purpose.
What motivates our churches? Our leaders? I wouldn't know how many variations could be listed. Bunches.
The thing that keeps me on my toes of anticipation in the kingdom is the fact that God can create something out of nothing and give life to the dead....Romans 4:17. And exactly what is it that God says triggers this? Faith. Miracles? No. Plain, common, ordinary, Bible faith.
I am motivated because God can; He can do anything. He can create something that isn't yet and He can cause dead things to come to life. Ever worked with a dead church? He can make it live. The fact it might be dead isn't the final straw. That He can't find anyone to believe He could make it live is the problem.
And, He can make something out of nothing. He can make mission support out of no hope. He can make new members out of no publicity to draw. He can connect with neighbors and nations when we can't explain how. It is all mystery; unexplainable, immeasurable mystery.
What keeps me motivated? God's talent within Himself; I don't need to possess it. I just need to believe He has it. Yet, my idea only touches the hem of the garment.
What motivates you about the work of the church? Yours might be what would give another reader hope.