The conditions of praying are the conditions of righteousness, holiness, and salvation.
He only can truly pray who is all aglow for holiness, for God, and for heaven.
It is not great talents or great learning or great preachers that God needs, but men great in holiness, great in faith, great in love, great in fidelity, great for God...
The ministry of prayer, if it be anything worthy of the name, is a ministry of ardor, a ministry of unwearied and intense longing after God and after his holiness.