In Rev 1:17, John was afraid but Jesus basically said, "Chill out. I've got this." In Mt 28:8, the women were "afraid yet filled with joy". But Jesus basically said, " Chill out. I'm alive and I've got this."
Many times Jesus leads us into unknown situations and challenges and we are like John and the women...afraid but excited for what is and will be happening.
But when its Jesus doing the leading and us doing the following, we have nothing to fear because Jesus is saying to us, "Chill out. I've got this."