Authority means "Out of His Essense"

Authority and power in Greek mean "out of his essence" and "out of I am".

The word power and authority in Greek is ἐξουσία "exousia".

It is used in Matthew 28:18 when Jesus said, "All authority (exousia) has been given to me in heaven and on earth."

It is used in Luke 9:1 when Jesus called the twelve together and gave them all power and authority over all demons and to cure deseases.

So, this "exousia" was given to Jesus and then to his followers.

In the Greek exousia means "out of His essence" and "out of I am". That means that Jesus and his followers have been given the very essence of God.

We have been given the very essence and substance of God, out of I Am, and this we are to use against demons and to cure deseases.