According to Mark

"Mark writes to show us that Jesus is the Messiah, the Son of God. In part I, He is the Sovereign Lord who wields authority over His Word, over the spiritual forces of darkness, even over sickness, disease, and death. In part II, He is the compassionate Shepherd who feeds His sheep with truth and love. And in Part III He is the Suffering Savior King who has come to redeem His people at the cost of His own life."