When we are told to pray without ceasing, it seems to many tastes to-day to be somewhat extravagant language. And no doubt that is true. Why should we be concerned to deny it? Measured language and the elegant mean is not the note of the New Testament at least. Mhoen zyan, said the Greek - too much of nothing. But can we love or trust God too much? Christian faith is one that overcomes and commands the world in a passion rather than balances it. It triumphs in a conclusive bliss, it does not play off one part against another. The grace of Christ is not but graciousness of nature, and He does not rule His Church by social act. The peace of God is not the calm of culture, it is not the charm of breeding. Every great forward movement in Christianity is associated with much that seems academically extravagant. Erasmus is always shocked with Luther . It is only an outlet of that essential extravagance which makes the paradox of the Cross, and keeps it as the irritant, no less than the life of the world - perhaps because it is the life of the world.
There is nothing so abnormal, so unworldly, so supernatural, in human life as prayer, nothing that is more of an instinct, it is true, but also nothing that is less rational among all the things that keep above the level of the silly. The whole Christian life in so far as it is lived from the Cross and by the Cross is rationally an extravagance. For the Cross is the paradox of all things; and the action of the Spirit is the greatest miracle in the world; and yet it is the principle of the world. Paradox is but the expression of that dualism which is the moral foundation of a Christian world. I live who die daily. I live another’s life.
To pray without ceasing is not, of course, to engage in prayer without break. That is an impossible literalism. True, “They rest not day and night, saying, Holy, holy, holy, Lord God Almighty, who wert, and art, and art to come.” But it is mere poverty of soul to think of this as the iteration of a doxology. It is deep calling unto deep, eternity greeting eternity. The only answer to God’s eternity is an eternal attitude of prayer.
Nor does the phrase mean that the Church shall use careful means that the stream and sound of prayer shall never cease to flow at some spots of the earth, as the altar lamp goes not out. It does not mean the continuous murmur of the mass following the sun round the world, incessant relays of adoring priests, and functions going on day and night.
But it means the constant bent and drift of the soul - as the Word which was from the beginning (John 1: 1) was hroe ton Qesn. All the current of its being set towards Him. It means being “in Christ,” being in such a moving, returning Christ--reposing in this Godward, and not merely godlike life. The note of prayer becomes the habit of the heart, the tone and tension of its new nature; in such a way that when we are released from the grasp of our occupations the soul rebounds to its true bent, quest, and even pressure upon God. It is the soul’s habitual appetite and habitual food. A growing child of God is always hungry. Prayer is not identical with the occasional act of praying. Like the act of faith, it is a whole life thought of as action. It is the life of faith in its purity, in its vital action. Eating and speaking are necessary to life, but they are not living.
From P T Forsyth's The Soul of Prayer, chapter five.