Drawing from the account of Israel's battle against the Amalekites in Exodus 17, this sermon explores the nature of spiritual warfare and the necessity of collective, sustained prayer as the foundation of any meaningful work done for God. The pastor emphasizes that victory in spiritual battle is not achieved through individual strength or human strategy alone, but through surrender to God and the faithful, ongoing intercession of a unified body of believers. Using the image of Yahweh Nisi, the Lord as banner, the sermon calls the congregation to rally under God's standard, recognize every role in the body as essential, and commit to a prayer life that sustains both the visible workers and the leaders who carry the weight of the mission. The sermon also weaves in personal testimony about marriage, identity, and the danger of limiting God to human understanding, ultimately calling believers to open-handed surrender and kingdom-minded community.