The Way of Perfection, by Teresa of Avila (1515-1582)
Describes the great importance of setting out upon the practice of prayer with firm resolution and of heeding no difficulties put in the way by the devil.
Oh, my daughters, how incomparably greater must be the risks they run! And yet they have no idea of this until they fall headlong into some real danger. Having perhaps no one to help them, they lose this water altogether, and drink neither much nor little of it, either from a pool or from a stream. How do you suppose they can do without a drop of this water and yet travel along a road on which there are so many adversaries to fight? Of course, sooner or later, they will die of thirst; for we must all journey to this fountain, my daughters, whether we will or no, though we may not all do so in the same way. Take my advice, then, and let none mislead you by showing you any other road than that of prayer.
- Chapter 21
(Keep in mind that she is writing to sisters in a cloistered contemplative order.)