The lack of adequate biblical training and teaching resources is a major challenge for the church in the developing world. 21C International developed the "Comments" series to provide short, easy to read, biblically sound resources. The Gospel according to Mark is an incredible writing focused on Jesus' life and miracles more than on his teachings. The Gospel emphasizes Jesus' identity as the Messiah, the Son of God. Mark shows Jesus supreme authority and power in both spiritual and physical realms.