This book comes out of years of reflection, failures, and some successes in the task of reaching out to others with the gospel.
Without diminishing or downplaying the importance of speaking.
Many Christians think of the task of mission as an entirely verbal activity, when perhaps the Best Kept Secret of New Testament teaching about mission is that it involves a whole range of activities that explicitly promote Christ to the world and draw others to him, and only a few of them involve speaking.
This book comes out of years of reflection, failures, and some successes in the task of reaching out to others with the gospel