Perhaps what we most need to learn, since we so easily forget it, is that mission is and always has been God's before it becomes ours. The whole Bible presents a God of missional activity, from his purposeful, goal-oriented act of Creation to the completion of his cosmic mission in the redemption of the whole of Creation—a new heaven and a new earth. The Bible also presents to us humanity with a mission (to rule and care for the earth); Israel with a mission (to be the agent of God's blessing to all nations); Jesus with a mission (to embody and fulfill the mission of Israel, bringing blessing to the nations through bearing our sin on the Cross and anticipating the new Creation in his Resurrection); and the church with a mission (to participate with God in the ingathering of the nations in fulfillment of Old Testament Scriptures).
But behind all this stands God with a mission (the redemption of his whole Creation from the wreckage of human and Satanic evil). The mission of God is what fills the Bible from the brokenness of the nations in Genesis 11 to the healing of the nations in Revelation 21-22. So any mission activity to which we are called must be seen as humble participation in this vast sweep of the historical mission of God. All mission or missions that we initiate, or into which we invest our vocation, gifts, and energies, flows from the prior mission of God. God is on mission, and we, in that wonderful phrase of Paul, are "co-workers with God."
-Chris Wright