But now, while we cannot always be thinking of God, and always speaking to God, we can always be mentally disposed toward Him, so that whatever we are doing there can be a mental leaning or bias towards His most holy will. Let me show you what I mean. We must reverently dare to reason in this great matter as we reason in other relationships. Turn, then, for an illustration, to common gymnastics. In physical gymnastics there is no need for us to be always exercising, to be at it every moment of the waking day. The body does not need it. Indeed, it would resent it, and rebel against it. But here is the healthy genius of gymnastic exercises. Regular exercises give the body a certain healthy pose, a certain vigour and excellence of carriage, which the body retains between the exercises when we are going about our accustomed work. That is to say, conscious exercise makes unconscious habit. Our conscious exercise forces the body into attitudes which persist as habits when we are doing something else. We can retain the pose of the gymnasium on the street, and we can retain it without thinking. And so it is with spiritual exercises when they are as real as the exercises in the gymnasium. When a man prays, and prays as deliberately and purposely as he practices physical exercises, when he drills his soul as he drills his body, he gives his mind and soul a certain pose, a certain attitude, a certain stateliness and loftiness of carriage. He gives his soul a healthy bias towards God, and the soul retains the bias when he is no longer upon his knees. His soul carries itself Godward even when he is earning his daily bread. God can get at him any time and anywhere! The way is open, the communion is unbroken! That is the vital logic of the matter. By regular spiritual exercises we can subdue the soul to spiritual habit. Again and again throughout the day it is possible for us, by a conscious upward glance, to confirm the habit; until it happens that the soul is always in the posture of prayer,--in business, in laughter, in trade, at home, or abroad, always in prayer,--and therefore, in every part of the wide and varied battleground of life receiving the all-sufficient grace and love of God. And so the Christian soldier is to be "Praying always, with all prayer and supplication in the spirit." But the Christian soldier is not only a suppliant for his own spiritual health. He is much more than this. The apostle counsels him to be a suppliant for the health of the entire Christian army. "Praying always, with all prayer and supplication in the spirit, and watching thereunto with all perseverance and supplication for all saints." That is to say, the Christian soldier not only prays for the health of his own spirit, but for a healthy "esprit de corps" throughout the whole militant Church of Christ. It is his duty and privilege to be prayerfully jealous for all the saints, and for the spiritual equipment of all his fellow-soldiers on the field.