Ekklesia: Greek word reffering to the New Testament Church. A People Called Out: Set Apart In Heaven and/or in Earth Hebrews 13:8 "Jesus Christ the same yesterday, and today, and forever."
Jesus said in:Matthew 18:20 "For where two or three are gathered together in my name, there am I in the midst of them."
So... Where 2 or 3, 300 are gathered together using the name of Jesus in the name of another, there is Jesus in the midst of the two or three gathered together in His name.
It's a matter of Heart. :) Jesus did not respond in Pride to the temptations of Satan: Luke 4:8 And Jesus answered and said unto him, Get thee behind me, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.