Why The Church Of Christ?

And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.

Matthew 16:18

And if he shall neglect to hear them, tell it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.

Matthew 18:17

Praising God, and having favour with all the people. And the Lord added to the church daily such as should be saved.

Acts 2:47

In these three scriptures the word church is singular not plural.  If the Lord added to the church those being saved, then it must have been very important that those saved people be members of the church.

Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.

Acts 20:28

Did Jesus Christ purchase something that was not necessary?  The record say's here that Jesus purchased the church with his own blood.  If the church is not a necessity, why is it that Paul said "Jesus purchased the church with his own blood".  If you can be saved outside of the church, then you can be saved without the blood of Jesus Christ, and Jesus died in vain.  Jesus shed his blood for the church.

There is one body, and one Spirit, even as ye are called in one hope of your calling;  One Lord, one faith, one baptism, One God and Father of all, who is above all, and through all, and in you all.

Ephesians 4:4-6

Paul say's there is just one body.  What is the body?  So how many churches are there?  You can look at this scripture and say;  If there are many churches there are many bodies.  If there are many churches there are many hopes.  If there are many churches there are many faiths.  If there are many churches there are many gods.  If there are many churches there are many fathers.  That makes as much sense as saying there are many churches, and they are all well pleasing unto God. 

Husbands, love your wives, even as Christ also loved the church, and gave himself for it;  That he might sanctify and cleanse it with the washing of water by the word,  That he might present it to himself a glorious church, not having spot, or wrinkle, or any such thing; but that it should be holy and without blemish. 

Ephesians 5:25-27

What name should the church wear?  Jesus purchased it with his blood.  Paul say's here that the relationship a husband has with his wife is like the relationship Christ has with the church.  So shouldn't the church be called by the name of the groom, Christ?