The LCMS constitution, in the 2007 handbook, outlines the first two objectives of the Synod:
Article III Objectives
The Synod, under Scripture and the Lutheran Confessions, shall—
1. Conserve and promote the unity of the true faith (Eph. 4:3–6; 1 Cor.
1:10), work through its official structure toward fellowship with
other Christian church bodies, and provide a united defense against
schism, sectarianism (Rom. 16:17), and heresy;
2. Strengthen congregations and their members in giving bold witness
by word and deed to the love and work of God, the Father, Son, and
Holy Spirit, and extend that Gospel witness into all the world;
I am curious how preaching succeeds in conserving and promoting the unity of the true faith and also strengthens congregations and their members in giving bold witness by word and deed to the love and work of God…
How do we defend the faith and strengthen the mission growth of the church in our preaching?