After Peter declared that Jesus was the Christ, The Savior said to him "And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven." (Matthew 16:19 https://www.lds.org/scriptures/nt/matt/16.19 )
That is what happens in Temples. This power to bind on earth and in heaven was restored to the prophet Joseph Smith and recorded in the Doctrine and covenants multiple times (D&C 127:7, D&C 124:93, D&C 132:46, D&C 128).
Because of the miracle of the Restoration of the Gospel, the sacred temple ordinances the Savior established in New Testament times have been restored to this earth to bless our Father in Heaven's children. With the miracle of temple work, all of Father in Heaven's children who have ever lived on the earth, and who would have accepted it if they were alive, will be able to have the opportunity to accept or reject those blessings, and inherit all that our Father in Heaven has. And these blessings were spoken of in the Bible.
And for us, when we go to the temple to do the work of our dead, we are able to feel of God's presence. The Doctrine and Covenants states "my glory shall rest upon it; Yea, and my presence shall be there, for I will come into it., and all the pure in heart shall see God" (D & C 97:15-16http://bit.ly/14GTNd6 )
Find out more about Christ. Along with the Bible, his words are in the Book of Mormon. Find out for yourself and read the Promise of the Book of Mormon online now at http://bit.ly/10t8QYm or get a free copy athttp://bit.ly/11WKJ1G
Questions? Click here to chat online http://bit.ly/14NQosW or, to meet with representatives from the Church of Jesus Christ of Latter-Day Saints, go to http://bit.ly/10t9mW7
Picture is of the St George Temple, can see it athttp://www.coralhills.com/blog/st-george-lds-temple/