And when he saw Jesus from afar. These words, "from afar," explain the fact of our Lord being immediately met by the man as soon as he left the boat. Mark 5:3-5 inclusive must be regarded as parenthetical.
They describe the ordinary condition of the demoniac, and his sad wild life from day to day. From the high ground which he frequented he had seen the boat, in which Jesus was, nearing the shore. He had seen the other boats.
Perhaps he had seen the sudden rise of the storm and its equally sudden suppression; and he, like others who witnessed it, was affected by it. So he hastened to the shore; he ran and worshipped him. He felt the power of his presence, and so he was constrained through fear to do him reverence, for "the devils also believe and shudder ( φρίσσουσι)" (James 2:19).