This book is dedicated to 'Q1', called 'the Heart of the Gospel'. This is the oldest layer of the so-called 'Book of Q' in English, French and Dutch translations. This is a reconstruction by scholars of the original 'oral lore' of Jesus of Nazareth. The 'Gospel of Mark' served as model for Matthew and Luke. Besides the 'Gospel of Mark', both Matthew and Luke used independently from one another a text called 'The Words of Jesus' or 'Q'. Mark did not. The redaction of these 'wisdom words' happened in three steps: 'Q1', 'Q2' and 'Q3'. The oldest layer is 'Q1'. 'Q1' was written ca.50 CE.