I highly recommend this resource for personal change in holy Christlikeness. It is very thorough in applying the doctrine of sanctification personally. It guides individuals through a 13-week study, breaking each week into 5 (day) sections. I found it manageable (30 minutes a day), instructive, convicting, practical, helpful, and impactful in my life. I wish I had worked through this book 30 years ago! Every Christian should.