The source is a transcript from a YouTube video by Dr. Tom LaHue that discusses the Enneagram Type One, also known as the Perfectionist or Reformer, using excerpts from the book The Unfiltered Enneagram by Elizabeth Wagele. Dr. LaHue offers an overview of Type One characteristics, highlighting the challenges such as their tendency toward judgment, rigidity, and resentment, which often stems from their core belief that the world is broken and their desire to control and correct perceived flaws.

www.tomlahue.com