“Unsure how to find grace and security in the complex world we’ve inherited, we try to fill up the spaces in our children’s lives with stuff: birthday entertainments, lessons, rooms full of toys and equipment, tutors and therapists. But material pleasures can’t buy peace of mind, and all the excess leads to more anxiety—parents fear that their children will not be able to sustain this rarefied lifestyle and will fall off the mountain the parents have built for them.”