"Prayer is no fitfull, short-lived thing. It is no voice crying unheard and unheeded into the silence. It is a voice which goes into God’s ear and it lives as long as God’s ear is open to holy pleas, as long as God’s heart is alive to holy things. God shapes the world by prayer. Prayers are deathless. The lips that utter them may be closed in death, the heart that felt them may have ceased to beat, but the prayers live before God, and God’s heart is set on them. Prayers outlive the lives of those who uttered them; outlive a generation, outlive an age, outlive a world." (E.M. Bounds)

and

"The one concern of the devil is to keep the saints from prayer. He fears nothing from prayerless studies, prayerless work, prayerless religion. He laughs at our toil, mocks our wisdom, but trembles when we pray.? (Samuel Chadwick)

~found at http://www.springofjoy.org/