Titles for Chapters that are Part 1 and Part 2

I am writing a book about praying the Bible. Currently, I have two lengthy chapters on what Jesus prayed and taught about praying. These are parts 1 and 2. I’m looking for someting than the a title line htat is somewhat distinct, but a subtitle that is part 1 or part 2. Any suggestion on how to handle two related chapters, but giving them something better thatn part 1 and part 2? Thanks.