The One who is sent, Jesus, is the One who sends the Spirit and also sends the disciples into the world. To be missional means to be caught up in the Son's and Spirit's work of being "sent" into this world, and that work emerges from the missional Father. The church is not a place to which people go, but a spiritual body that is on a mission to draw, as did Jesus, others into the One who sent him ([John] 6:44).
So Paul took his stand in the open space at the Areopagus and laid it out for them: "I'm here to introduce you to this God.... He doesn't play hide-and-seek with us. He's not remote; he's near. We live and move in him, can't get away from him!" ~Acts 17