The Introduction to the Devout Life was a literal life changing book for me. I was very excited to pick up this book as a consequence. Well, this one I feel wasn't as good as the former, that may just be my place in life right now. There were lots of good small pieces to pull out of this that you can apply to your own theology and to your own life. I feel St. Francis de Sales is a more optimistic theologian than others, as he always focuses on the positive and God's mercy, and the joy we can have through Him.