I wanted to provide a bit of additional information about Psalm 1. While the previous post on establishing the text applies obviously to Psalm 1, the chapter itself is a peculiar chapter. It was most likely written after the completion of the rest of the text and added as an introduction to the book. Furthermore the book of Psalms is actually a collection of 5 books, arranged not in chronological order, but instead by purpose. We don’t know what person or people arranged the books, but can only attribute it to the work of the Holy Spirit. The first 8 chapters of the Psalm 1 function as an introduction to the greater work. Also in it we will see the first major theme introduced. I can think of no better extra-biblical introductory chapter that ties together the origin of such a number of teachings and themes.