I am the way, the truth, and the life: no man cometh unto the Father, but by me (John 14:6).
Before Heavenly Father sent us to earth, He chose Jesus Christ to be our leader and Savior. You chose to follow Jesus Christ before you were born.
When Jesus came to earth, He taught the gospel and set up His Church. He kept His promise to be our Savior. He suffered and died and was resurrected so that we could be resurrected and live again with Heavenly Father and our families.
Talk Source: http://www.lds.org/friend/2009/04/jesus-christ-is-my-savior?lang=eng