T. Austin-Sparks emphasizes the concept of God as the potter and believers as clay, illustrating how Israel's refusal to accept God's pattern in Christ led to its marred state. He explains that God is now creating 'another vessel' that aligns with Christ, the ultimate pattern, which was always His intention from eternity. The sermon highlights that the Old Testament foreshadows Christ, and the early Christians understood this, using it to preach the Gospel. Sparks also discusses the mystery of Christ's virgin birth and the transformative work of the Holy Spirit in believers' lives, urging them to recognize their identity as part of a greater whole in the Church. Ultimately, he calls for a deeper understanding of the Pattern that is Christ, encouraging believers to learn from Him.