Prayer is communication between humanity and divinity. When prayer is effective, it avails much. God want to do many things on the earth today, but it can only be accomplished through active prayer ministry of the church. Through prayers we bring to pass the will of God on earth.
In Luke 10:2, It is the desire of our Lord Jesus for the Church to grow because the harvest is great but many obstacles and factors are preventing this promise from coming to past. We need to stand against these obstacles in our prayers.
For there to be revival in the church of God, the church must become very prayerful. It is only prayer that can bring about the expected revival that will make the church stand out in Jesus name.