Who's Church is it?

Here is something to think about. When Jesus ask his disciple, Who do people say that I am? He went on to tell Peter, after His personal cofession that Jesus is Lord, that Upon this rock He would build His Church. John's gospel teaches that He is the way the truth and the light unto salvation. Then in 1 Corinthians 12 Paul discusses the diversity of gifts that are given for the building up of the church. He finishes that chapter by saying the gifts are given to each christian according to His purpose.
Here's the thought, If Jesus is the establisher of the church, and if salvation is of God, and if He gives gifts according to His purpose for every beleiver, and if they are for the building up of the church. There really cannot be any question as to who's church it is. And if it is His church we are to be about the ministry He has called us to and to serve Him as bondservants.