Prayer and a holy life are one. They mutually act and react. Neither can survive alone. The absence of the one is the absence of the other.
A holy life does not live in the closet, but it cannot live without the closet.
We cannot talk to God strongly when we have not lived for God strongly. The closet cannot be made holy to God when the life has not been holy to God.
We may excuse the spiritual poverty of our preaching in many ways, but the true secret will be found in the lack of urgent prayer for God's presence in the power of the Holy Spirit.
The Holy Ghost does not flow through methods, but through men. He does not come on machinery, but on men. He does not anoint plans, but men - men of prayer.