God does not expect a Christian to begin and end at the point of receiving salvation. He expects one to follow up their salvation with a continual personal development consistent with the new life.
The objective of this book is to provide you with everyday tools that you could use to transform your life and become Christ-like not only in nature, but also in deed.
Ahead of the saved is a clear path to be followed and a life to be lived. Follow the path strictly. Live the life narrowly. Walk the talk always.