Christianity is a religion of power
Truly, power is derived from spiritual sources. Before anything could take place in the physical, some actions must have been taken place in the spiritual realm.
When this occurs, nobody has any power to change the situation.
we can say that power is the process of control given by God through the spoken words that cause things to happen
We are only able to bind the evil and spoil his works by the power of Christ; otherwise we are no matches for the devil.
People mix these two things up whereas they are two different things. As far as Christians are concerned, their authority comes from the word of God whilst their power comes from the anointing of the Holy Spirit.