Acts 4:8-12
Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel, If we this day be examined of the good deed done to the impotent man, by what means he is made whole; Be it known unto you all, and to all the people of Israel, that by the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, even by him doth this man stand here before you whole. This is the stone which was set at nought of you builders, which is become the head of the corner. Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
Not only is our Christ our savior and redeemer, but he is also the head of the Church. There is only one way to salvation and that is though Christ and his teachings. These teachings can only be found in one place on earth and that is in his Church. Christ is the head of the Church and it follows his teachings and directions.