Christ In Training is a book, but it is also a lifestyle, a spiritual lifestyle.
There are essential qualities to living a spiritual life that Jesus both spoke of and emulated qualities such as love and forgiveness.
I believe we are all actively encouraged to live by those qualities, not only because they are moral, but also because they are practical. Just for instance, Jesus said, “You have heard it said, ‘An eye for an eye and a tooth for a tooth,' but I say to you love your enemies, do good to those who hate you.”