"Do not let your hearts be troubled."  (John 14:1)  Be at peace, Jesus said.  Don't be afraid.  It's the most common command in the Gospels.  Much of the time, Jesus says it when the disciples catch a glimpse of His glory.  Think about His transfiguration, or when He walked on water.  But this time, Jesus reassures them because He is leaving. They were used to having Him walk with them in one way, but once He was gone, He'll be with them in a new way. 
Jesus wanted His friends to know that even though He would not be with them in bodily form, He wasn't really leaving them alone.  He would be with them through the Holy Spirit living inside them.  He would be with them in His Eucharistic presence.  He would be present in their brothers and sisters in the faith.  They just needed to learn to see Him in a different way.
Like the disciples, we experience change in our lives -- change that might make us wonder if Jesus is still with us.  The things we are accustomed to can get disrupted, just as we are presently and clearly experiencing during this devastating pandemic.  But we know that Jesus has not left us alone during this tragic time.  He wants to give us eyes to see Him in every situation.  So take His words to heart: "Do not let your hearts be troubled.  You have faith in God; have faith also in me."  (John 14:1)
"Jesus, help us trust that you are with us always.  Lord, come and calm all our fears."