“Do not rejoice in that this, that the spirits are subject to you, but rejoice that your names are written in heaven.” (Luke 10:20)
Over the years, I have heard various missionaries and Christian leaders say that these words of Jesus indicate that he intends that his disciples should find their joy and satisfaction not in their ministries but rather in their personal salvation (justified status with God). I found a recent example of this thinking in a book I am reading, The Emotionally Healthy Leader.
Jesus sends out seventy-two disciples two by two. When they return, they are excited to report significant numerical impact and that the demons submit to them in his name. Jesus affirms their activity of kingdom building, but he also reminds them of something more important: “Do not rejoice that the spirits submit to you, but rejoice that your names are written in heaven” (Luke 10: 20). In other words, he wants them to remember that their joy comes from their relationship with him, not their achievements for him. (Scazzero, Peter. The Emotionally Healthy Leader: How Transforming Your Inner Life Will Deeply Transform Your Church, Team, and the World (p. 37). Zondervan. Kindle Edition.)