Ephesians 3:20:

Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us,

Notes on Ephesians 3:20:

The fact that God can do more than we can think shows the necessity of praying in other tongues.  Otherwise, we’ll limit God to answering prayers that our heads can think up.

Many people forget the end of this verse; they just say that God can do exceedingly abundantly above all that we ask or think, and they leave it at that.  But the way that He does it is based on the power that works in us!  We need to be aware of His mighty power that works in us.

God CANNOT do exceedingly abundant things without working through people because man has authority on the earth (Psalm 115:16).  The is why praying for God to just dump revival power on your town is futile.  He works through the power that works in US.  We cannot ask God to do what He has told us to do.  He does not go out and lay hands on sick people in faith; He has delegated that job to us.

See also:

God’s Power Toward You
Who You Are and What You Have
No Limits