T. Austin-Sparks emphasizes the law of reproduction as essential evidence of life, highlighting that God's command to 'be fruitful and multiply' reflects the organic relatedness of life. He warns against exclusivism, which leads to death and disintegration, and stresses that true livingness involves transmitting life to others rather than hoarding it. The sermon illustrates the importance of being a vessel for God's blessings to the nations, contrasting the barren fig tree with the fruitful vine. Sparks calls for a spirit of sacrifice and travail in reproduction, urging Christians to focus on what they can give to the world rather than becoming self-centered. Ultimately, the vitality of any Christian community is measured by its ability to produce life beyond itself.