http://www.lds.org/ensign/2013/12/the-promise-of-christmas?lang=eng
Prophecies of his Coming
Christ’s coming was foretold for thousands of years. About 2,000 years before the birth of Jesus Christ, Abraham taught about His role in the plan of salvation. About 1,400 years before His birth, Moses taught the same wonderful truths. About 700 years before His birth, Isaiah revealed the circumstances of His birth, life, and death:
“Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel” (Isaiah 7:14)
“For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace” (Isaiah 9:6).
The Promise of Christmas
His promise that we can become His sons and daughters will be realized as we believe in Him and exercise faith in Him unto obedience. Then we will be prepared to receive the gift of eternal life.
Obtaining the Promise
May we take time this Christmas season to renew our covenants to follow the Savior and to do His will, just as He did the will of our Heavenly Father. As we do so, the words of King Benjamin’s people, recorded 125 years before the Savior’s birth, will be fulfilled for us today: “O have mercy, and apply the atoning blood of Christ that we may receive forgiveness of our sins, and our hearts may be purified; for we believe in Jesus Christ, the Son of God, who created heaven and earth, and all things; who shall come down among the children of men” (Mosiah 4:2).