As they were coming down the mountain, he ordered them not to tell anyone what they had seen until after the Human One had risen from the dead. 10 So they kept it to themselves, wondering, “What’s this ‘rising from the dead’?” 11 They asked Jesus, “Why do the legal experts say that Elijah must come first?” 12 He answered, “Elijah does come first to restore all things. Why was it written that the Human One would suffer many things and be rejected? 13 In fact, I tell you that Elijah has come, but they did to him whatever they wanted, just as it was written about him.” (Mark 9:9-13, CEB)

Why did Jesus tell them not to tell until after the rising from the dead?

Jesus knew they would not be believed, because they were just on the mountain with Jesus, Moses, and Elijah. And the happenings were not believable, until we see that Jesus rose from the dead. 

Sometimes the things we believe are unbelievable, and that my friends is faith. We live by faith.

Know that the promises we have are true, and we can live in the hope of the risen savior. 

Hope is greater than fear, and love of Christ will always give us hope.