John 14:12 - "Truly, truly, I say to you, he who believes in Me, the works that I do shall he do also; and greater works than these shall he do; because I go to the Father."
The miracles of Jesus were a demonstration of how the authority of the Kingdom of Heaven has dominion over any condition on the earth. To the degree that we abide in the Kingdom by abiding in the King, we too can walk in authority over any condition on the earth. As we approach the end of this age, this will change from "can" to "must."
OUR GOAL IS JESUS
Jesus demonstrated this with His life, and this is what He has called us to walk in. It is a high calling, and such authority can only come from abiding in the King who is above all rule, authority, and dominion. So our primary goal should not just be power or authority, but the One who has all power and authority. Even so, at the end of this age, His Body is going to demonstrate His power, dominion, and authority to prepare the way for His coming Kingdom.
Before the end of this age, there will be some who say to mountains "be plucked up and cast into the sea" (see Matthew 21:21), and the mountains will obey them. This must be done to prove that His Word is true. There will be those who see every miracle Jesus performed and even more. Some are already growing in authority and will one day walk in authority over every disease or affliction.
John 17:22-23: - "The glory which You have given Me I have given to them, that they may be one, just as We are one; I in them and You in Me, that they may be perfected in unity, so that the world may know that You did send Me, and loved them, even as You have loved Me."
When the Church matures and becomes what she is called to, it will be in such unity that the world will marvel.
This authority of the Kingdom will coincide with the Gospel of the Kingdom being preached. One basic characteristic of those who walk in this authority is that they will be in unity with one another. This authority can only come from abiding in the King, and those who are rightly joined to the King will also be rightly joined to His Body.