As a teenager I read through the whole Bible over the course of a few years. It took me a while to slog through some of the more obscure books—the Levitical laws and the prophets—a lot of the Old Testament stuff. The New Testament was different though. The Gospels and the book of Acts were these riveting narratives and the Epistles—of Paul and Peter and John and whoever else—contained this complicated philosophy I was only beginning to understand.
Well if you go back and look at my old Bibles (either an NKJV or an NASB) in many New Testament passages you will find the symbol above scribbled all over the margins.

