An in-depth study of the meaning of discipleship based on the Gospel of Mark. This book analyzes the disciples' transition from ignorance to a deeper understanding of Jesus' identity, despite their frequent failures in practice. The meaning of 'Following' emphasizes that discipleship means walking the 'way of the cross' of suffering, humility, and service rather than seeking worldly glory. This book examines how Mark portrays discipleship as more than just a moral lesson, but a complete transformation of mindset and lifestyle shaped by Jesus' teachings. Furthermore, it examines Jesus' call (as in Mark 1:17, 8:34) and intimate interactions outside the crowd, demonstrating that discipleship requires a strong personal commitment. This book indirectly connects the story of the disciples in Mark's Gospel to the demands of Christian discipleship today, including obedience to Christ's call. It argues that the failure of the disciples in Mark is not meant to diminish their role, but rather to highlight the grace and restoration of Jesus.