Jesus himself taught that he was the unique Son of God (John 10:36; Matt. 16:15-17), the foretold Messiah (Mark 14:61, 62), that he had a prehuman existence in heaven (John 6:38; 8:23, 58), that he would be put to death and then would be raised to life on the third day and would thereafter return to the heavens. (Matt. 16:21; John 14:2, 3) Were these claims true, and was he thus really different from all other true prophets of God and in sharp contrast to all self-styled religious leaders? The truth of the matter would be evident on the third day from his death. Did God then resurrect him from the dead, thus confirming that Jesus Christ had spoken the truth and was indeed God’s unique Son? (Rom. 1:3, 4) Over 500 witnesses actually saw Jesus alive following his resurrection, and his faithful apostles were eyewitnesses as he began his ascent back to heaven and then disappeared from their view in a cloud. (1 Cor. 15:3-8; Acts 1:2, 3, 9) So thoroughly were they convinced that he had been raised from the dead that many of them risked their lives to tell others about it.—Acts 4:18-33.