One important way that God shows His love for us is by calling prophets, who are given the priesthood—the power and authority given to man to act in God’s name for the salvation of His children. Prophets learn the gospel of Jesus Christ by revelation. They in turn teach the gospel to others and testify of Jesus Christ as the Savior and Redeemer. The teachings of prophets are found in sacred books called scriptures.
Whenever people choose to disregard, disobey, or distort any gospel principle or ordinance, whenever they reject the Lord’s prophets, or whenever they fail to endure in faith, they distance themselves from God and begin to live in spiritual darkness. Eventually this leads to a condition called apostasy. When widespread apostasy occurs, God withdraws His priesthood authority to teach and administer the ordinances of the gospel.
God revealed the gospel of Jesus Christ to Adam and gave him priesthood authority. Adam was the first prophet on the earth. By revelation, Adam learned of mankind’s proper relationship with God the Father, His Son Jesus Christ, and the Holy Ghost; of the Atonement and Resurrection of Jesus Christ; and of the first principles and ordinances of the gospel. Adam and Eve taught their children these truths and encouraged them to develop faith and to live the gospel in all aspects of their lives. Adam was followed by other prophets, but over time the posterity of Adam rejected the gospel and fell into apostasy, choosing to be unrighteous.
Thus began the pattern of prophetic dispensations that makes up much of the recorded history of the Old Testament. Heavenly Father revealed His gospel through direct communication to prophets such as Noah, Abraham, and Moses. Each prophet was called by God to begin a new dispensation of the gospel. To each of these prophets God granted priesthood authority and revealed eternal truths. Unfortunately, in each dispensation people eventually used their agency to choose to reject the gospel and then fell into apostasy.
words are strait from Preach my Gospel A guide to missionary service
SCRIPTURE STUDY
Unwavering Love 