Evangelism takes those who are spiritually dead and brings them to the point where they can be discipled; this is not an overnight event but a process with multiple stages.
Measuring the success of discipleship is important; however, we must make sure to employ the right tools of measurement in order to judge that success.
Ken Boa discusses more principles behind the "why" of discipleship, ranging from the idea that we cannot appraise our own ministries in this life, to the importance of spiritual friendship as a component of discipleship.
Ken Boa discusses principles behind the "why" of discipleship, including the fact that we need to be disciples ourselves before we can make disciples, discipleship is an ongoing process that depends on God, and people aren't our disciples but God's.
Ken Boa discusses the range of spiritual conditions in which a person may be when confronted with the claims of Christ, and how we approach people in those various places.