Jesus rises from the dead and ascends into heaven. Some find it hard to believe this could have happened, but look at the reaction of his disciples. They had to have been convinced of the truth of it or they would not have continued to be followers of Jesus. All of them suffered for their faith, but all continued to believe in Jesus.
We follow a living Savior. Just as he had victory over his own death, he will have victory over our sins and deaths. One day we will see it for ourselves, but today we accept it by faith.