"A threshold is a sacred thing," goes the traditional saying of ancient wisdom. In some corners of the earth, in some traditional cultures, and in monastic life, this is still remembered. But in our fast-paced modern world, this wisdom is often lost on us. It is important for us to remember the significance of the threshold. While it is certainly true that thresholds mark the end of one thing and the beginning of another, they also act as borders-the...