Here's the account from the Gospel of John...
Mary was standing outside the tomb weeping; and so, as she wept, she stooped and looked into the tomb; and she saw two angels in white sitting, one at the head and one at the feet, where the body of Jesus had been lying. And they said to her, "Woman, why are you weeping?" She said to them, "Because they have taken away my Lord, and I do not know where they have laid Him." When she had said this, she turned around and saw Jesus standing there, and did not know that it was Jesus. Jesus said to her, "Woman, why are you weeping? Whom are you seeking?" Supposing Him to be the gardener, she said to Him, "Sir, if you have carried Him away, tell me where you have laid Him, and I will take Him away." Jesus said to her, "Mary!" She turned and said to Him in Hebrew, "Rabboni!" (which means, Teacher). Jesus said to her, "Stop clinging to Me, for I have not yet ascended to the Father; but go to My brethren and say to them, 'I ascend to My Father and your Father, and My God and your God.'" Mary Magdalene came, announcing to the disciples, "I have seen the Lord," and that He had said these things to her. So when it was evening on that day, the first day of the week, and when the doors were shut where the disciples were, for fear of the Jews, Jesus came and stood in their midst and said to them, "Peace be with you." And when He had said this, He showed them both His hands and His side The disciples then rejoiced when they saw the Lord. John 20 11-20
Not only did Jesus appear to his immediate disciples after His resurrection but He also appeared to over 500 of his followers at once! At the time the apostle Paul wrote about this fact many of the witnesses were still alive who would corroborate his story. Paul himself persecuted Christians until Jesus appeared to him on the road to Damascus, years after His ascension to heaven. Here is how Paul describes the good news about Jesus death, burial and resurrection...
I passed on to you what was most important and what had also been passed on to me. Christ died for our sins, just as the Scriptures said. He was buried, and he was raised from the dead on the third day, just as the Scriptures said. He was seen by Peter and then by the Twelve. After that, he was seen by more than 500 of his followers at one time, most of whom are still alive, though some have died. Then he was seen by James and later by all the apostles. Last of all, as though I had been born at the wrong time, I also saw him. For I am the least of all the apostles. In fact, I’m not even worthy to be called an apostle after the way I persecuted God’s church. 1 Corinthians 15:3-9
I believe these things by faith, but still there are many skeptics today. However many agnostics and atheists like Lee Strobel (The Case for Christ) and Josh McDowell (Evidence Demands a Verdict) took the initiative to actually study the claims of Christ. The overwhelming evidence lead them to believe that Jesus is the Christ, the Son of the Living God. Even Josephus, the secular 1st century historian attests to evidence of Jesus' resurrection...
" ...About this time there lived Jesus, a wise man, if indeed one ought to call him a man. For he was one who wrought surprising feats and as a teacher of such people as accept the truth gladly. He won over many Jews and many of the Greeks. He was the Messiah. When Pilate, upon hearing him accused by men of the highest standing amongst us, had condemned him to be crucified, those who had in the first place come to love him did not give up their affection for him. On the third day he appeared to them restored to life, for the prophets of God had prophesied these and countless other marvelous things about him. And the tribe of the Christians, so called after him, has still to this day not disappeared." Josephus' Testimonium Flavianum, from Antiquities of the Jews 18:63-64
The Gospel of John closes with the reason for his writing. His purpose in writing his gospel is that you will be presented with the factual truth about Jesus and hopefully come to believe his claims. We who believe in Him have hope beyond the grave... because He rose from the dead, so shall we!
Therefore many other signs Jesus also performed in the presence of the disciples, which are not written in this book; but these have been written so that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name. John 20:30-31
