Gerhard (or Gerrit) Roosen (1612-1711) was a Mennonite bishop in northern Germany. He  is famous today mostly for the catechism he published when he was 90 years old, the Christliches Gemütsgespräch or “Christian Spiritual Conversation on Saving Faith and the Acknowledging of the Truth Which Is After Godliness in Hope of Eternal Life (Titus 1:1, 2), in Questions and Answers…