By Andrew Estocin Christmas can be too comfortable sometimes.  As the Nativity Season unfolds, churches are celebrating the birth of Christ.   Gifts are being shared, kitchens are busy preparing traditional foods, and retreat speakers have returned home from their visits to parishes. While all these events may be well intentioned, they frequently point us in the direction of nostalgia rather than a living faith.  Nostalgia can often be unhealthy.   The more we focus solely on