MH page 510

The reason why so many are left to themselves in places of temptation is that they do not set the Lord always before them. When we permit our communion with God to be broken, our defense is departed from us. Not all your good purposes and good intentions will enable you to withstand evil. You must be men and women of prayer. Your petitions must not be faint, occasional, and fitful, but earnest, persevering, and constant. It is not always necessary to bow upon your knees in order to pray. Cultivate the habit of talking with the Saviour when you are alone, when you are walking, and when you are busy with your daily labor. Let the heart be continually uplifted in silent petition for help, for light, for strength, for knowledge. Let every breath be a prayer.

Continuous communion and silent prayer maintain spiritual defense against evil. The text focuses entirely on spiritual disciplines and maintaining constant mental prayer.