I was embedded in American evangelicalism for 50 years, first as a convert, then as a Presbyterian minister, and then as editor-in-chief of Christianity Today, a leading voice in evangelical Christianity. Why would someone like me become a Catholic? It would take a book to even scratch the surface, for conversion is a complex reality.  But in this space let me give just one reason. In what is often called his high priestly prayer, Jesus said this:

As you, Father, are in me and I am in you, may they [the disciples] also be in us, so that the world may believe that you have sent me. The glory that you have given me I have given them, so that they may be one, as we are one, I in them and you in me, that they may become completely one, so that the world may know that you have sent me and have loved them even as you have loved me. – John 17:20-23