"Cosmic Authority of The Compassionate King"

Something about Jesus drew his disciples to him. Yet it's clear that when they signed on with him they really had no idea what they had signed up for. A storm that was furious enough to terrify seasoned fishermen meant nothing to Jesus. "Be still!" he calls out to the unruly elements of wind and water and incredibly enough, they respond as if they had heard this voice before.
But notice the response of the disciples. "Who is this man?" they ask with incredulity, because they had never seen nor heard off anyone who possessed such unparalleled power & authority over the natural world. A demon possessed man who terrorized the inhabitants of an entire city falls to his knees before Jesus, and Jesus calmly says "Come out!" The demon obeys Christ's command immediately, and as a consequence the people of the city are overcome with fear and beg Jesus to leave immediately.

There is something about Jesus's power that is both attractive and repellent. Like the disciples, we fail to realize whom we have signed up to follow. Like the Gerasenes who lived in the city, we sometimes ask Jesus to back off because we are afraid of what he might do next or, even worse yet, what he might ask us to do! We call Jesus our Savior but we forget the staggering ramifications of the fact that he is also our Sovereign Lord.

In a few verses, Mark demonstrates Jesus' lordship over the natural world (the storm) over the spirit world (the demon who possessed the man), and if we continue reading, we see him conquer the implacable foes of every human being, disease and death itself! If Jesus' disciples had any questions about the authority of this God-man they were following, they would soon be reassured. These were not tricks. Jesus possessed all authority in heaven and on earth. And maybe the most remarkable thing about his authority is that he chose to use it to suffer and die in our place, instead of exercising that authority to save himself from death on the cursed cross, abandoned and alone.

"And a great windstorm arose, and the waves were breaking into the boat, so that the boat was already filling. But he was in the stern, asleep on the cushion. And they woke him and said to him, “Teacher, do you not care that we are perishing?” And he awoke and rebuked the wind and said to the sea, “Peace! Be still!” And the wind ceased, and there was a great calm. He said to them, “Why are you so afraid? Have you still no faith?” And they were filled with great fear and said to one another, “Who then is this, that even the wind and the sea obey him?” 
Mark 4:37-41 (ESV)