Matthew 28 is surely the “Go and tell” chapter. The angel told the two Mary’s to “Go and tell” the disciples that Jesus is risen. Then Jesus met them as they were going and told them again to “Go and tell” the disciples. Later when Jesus met up with the disciples on a mountain in Galilee, he again told them to “Go” and continue His mission of saving folks. Amazingly, even the soldiers would “Go”; they were witnesses to the resurrection and went and told the Chief Priests. The Chief Priests also would “Go” and tell the Elders.
I remember “going and telling” several people when I found a 20 dollar bill in a bush near a school. I wanted them to know that something good had happened to me. I guess I wanted them to share in my joy, too. Sharing with them sort of let the good feeling continue a little longer. In some ways, telling folks that God loves them, wants to freely forgive their sins, and already made a way to do that on the cross, keeps the joy of my salvation real and fresh each new day.