Jon Walker, Costly Grace: A Contemporary View of Bonhoeffer's The Cost of Discipleship, pages 18-19
"...Discipleship means we are inseparably bonded to Jesus. Without him, there can be no discipleship: he is the curriculum we study; he is the Word we believe; and he is the Way we live...
.... Jesus is our textbook on how to live connected to God, how to make decisions with the mind of Christ, and how to act on promptings from the Spirit rather than self-impulse. The more intimate we become with Jesus, the more successful we will be at becoming like him."
(Just started reading this book, and so far I am very impressed!)