Easter is the celebration of one of the most important events in human history. The Resurrection of Jesus Christ was God's cosmic yes to all the teachings of Jesus. Jesus taught that he was the long promised Messiah of Deuteronomy 18.18 and Isaiah 52 - 54. He proved his authenticity by healing miracles and prophesying His own death and resurrection. Jesus taught that God was making a new Covenant of forgiveness. This Covenant offered forgiveness of sins through repentance and faith in Jesus sacrificial death. It did not replace but did supersede the Old Testament Covenant of Moses.
This sounds too good to be true
It is hard for modern scientific people to believe in miracles. Many have sadly bought into the great lie of modern liberalism which has deconstructed the Bible and questioned everything supernatural. There are three reasons for believing the resurrection story is historically true. First of all the specific details about the linen bandages and napkin suggest an eyewitness account as opposed to a made up story. Secondly the non-heroic confusion and misinterpretation of the Disciples also suggest this is real life rather than fiction. But the biggest reason for belief is the changed lives of the people who were there. This small group of people who had known and seen the risen Jesus went on to change the world. They went fearlessly to horrible deaths with joy on their faces as they witnessed to the intervention of God in history.