As Latter-Day Saints, we believe the words of God. We believe that He created Adam and Eve. We believe that He visited Moses in the burning bush. We believe that he led the children of Israel out of Egypt. We believe that David slew Goliath, that Daniel left the den of lions unharmed, and that Isaiah saw Christ's day. We believe that Jesus Christ came to the earth. We believe that He established a church and gave His apostles divine authority. We believe that He taught many people and performed many miracles in the Eastern and Western hemispheres. In short, we believe that the scriptures are the word of God.
We also believe the words of the New Testament prophet Amos when he said, "Surely the Lord God will do nothing, but he revealeth his secret unto his servants the prophets" (Amos 3:7). We believe that God still reveals His word through a prophet. That divine authority has been restored! We believe what God tells us today through His prophet. In addition, we believe that God will continue to lead and guide His people. Just like the saints in the scriptures, if we follow God's prophet, we can know God's will for us. I firmly believe this and testify of it.
For more on the Articles of Faith, see http://mormon.org/articles-of-faith/.