Of pietatis pietatis, piety, devotion, compassion, moral rectitude. Religious tendency within Lutheranism, begun in Leipzig at the end of the seventeenth century, which emphasizes subjective religious experience versus doctrinal principles, religious experience based on the reading and literal interpretation of the Bible, on shared prayer and an ascetic life contrary to any pleasure or delight. Immanuel Kant was educated by his mother in this religious attitude. Later it would evolve into Deism, the religious position of the Enlightenment.