Jesus is indeed King of the Universe, but He's not expecting to have to do more than He's already done. He did the hard part: He defeated sin, Death and Hell. Sin is washed away by His Blood. We have the job of bringing His enemies to His Feet. Whenever we encounter sickness, death or any Satanic forces: we are to take authority over them. The last enemy that will be defeated is Death. I believe that means that we will one day come into agreement and bring Death to his knees. Scripture backs this up.
The last enemy that shall be destroyed is death.
And in those days shall men seek death, and shall not find it; and shall desire to die, and death shall flee from them.
But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.
We will one day come to know the awesome power and authority that belongs to the Body of Christ.