"Pray without ceasing. In everything give thanks: for this is the will of God in Christ Jesus concerning you" (1 Thessalonians 5:17-18)
Here's how the file card works when it gets into the Christian life and begins to create mental habits: It divides the Bible into sections fitted to the days of the year, and compels the Christian to read according to rule. No matter what the Holy Spirit may e trying to say to a man, still he goes on reading where the card tells him, dutifully checking it off each day.
Inevitably the calendar crowds out the Spirit and the face of the clock hides the face of God. Prayer ceases to be the free breath of a ransomed souls and becomes a duty to be fulfilled. And even if under such circumstances he succeeds in making his prayer amount to something, still he is suffering tragic losses and binding upon his soul a yoke from which Christ died to set him free.
It is the privilege of every Christian to live so fully in God that he never gets out of the experienced Presence for one moment. The whole life becomes a prayer ... thoughts become mental prayers, deeds become prayers in action and even sleep may be but unconscious prayer.
~A. W. Tozer~