It is natural for us to feel proud of our work, especially when we do it well. The disciples come back happy after a successful mission, excitedly telling Jesus that they were able to cast out demons. Jesus appreciates their success but tells them to focus on something more important. What matters most is that their names are written in heaven. 

The greatest joy for them—and for us—is our relationship with God. It is this connection with God that makes our work meaningful. Jesus said, "Blessed are the eyes that see what you see." The disciples recognized that God is present in Jesus and believed in His special connection with the Father, feeling part of that relationship. This connection is the true source of their joy after they have done their best. 

Sharing in Jesus' relationship with God is our greatest treasure, more valuable than any accomplishments we may have in life. This relationship is what "many prophets and kings wanted to see and hear," and it is the deepest reason we feel joy and gratitude. Even when our working lives end, our connection with God through Jesus continues.