T. Austin-Sparks emphasizes the inseparable relationship between life and Christ in his sermon 'A New Day Foreshadowed,' highlighting that true life comes only through the death of Christ, which many reject. He discusses the transition from the Passover to the Feast of Tabernacles, symbolizing a new spiritual order where believers are called to live in faith and separation from worldly influences. The sermon underscores the importance of knowing the Father and the Son, asserting that life leads to light and true understanding of God. Sparks points out that the new day, represented by the eighth day of the Feast, signifies the Church under grace and the outpouring of the Holy Spirit. He concludes by stressing the necessity of a hidden life in God, where believers must prioritize their inner communion with Him over external religious systems.