The Christian biblical teaching fits into the general strategy of God to save man. God has constituted teachers (Ephesians 4:11) and other leaders of the church of Christ to be "advising and teaching with all wisdom all human beings, to present them all perfect in him."
If every Christian is a trumpet of God in the world, with knowledge, charity and example, we can achieve great results.
Well said brother Ammarn, you know the mission we have.