Timothy Keller Sermons Podcast by Gospel in Life

Now You Are Light

Mar 12, 2025

Christianity is about a constant internal debate, where winning arguments leads to growth. The concepts of light and darkness are explored through Ephesians, emphasizing truth, righteousness, and service as hallmarks of faith. Listeners are urged to embrace their identity as children of light, focusing on the transformative power of God's grace and the importance of forgiveness. The discussion also contrasts divine light with human darkness, reflecting on the moral choices that shape one's life and urging self-reflection and a commitment to serving others.

39:44

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Quick takeaways

True transformation in Christianity involves a radical shift from darkness to light, emphasizing an identity change rather than mere behavioral improvement.

The ongoing struggle between self-centeredness and genuine service highlights the importance of continually discerning and embodying the light in daily life.

Deep dives

The Essence of Transformation

True transformation through Christianity is characterized as more than just following rules; it involves a profound change of the heart influenced by the gospel. This concept emphasizes that Christian life is not merely an ethical system but a supernatural shift in one’s nature. The teachings from the book of Ephesians highlight this distinction, particularly in the transition from darkness to light, underscoring the need for believers to reflect their changed identity in daily living. This transformation is conveyed through the metaphor of light representing goodness, righteousness, and truth, which are essential fruits of a life grounded in faith.

Intro

2min

From Darkness to Light: Living Out Faith and Identity

4min

Light vs. Darkness: A Biblical Exploration

13min

The Transformative Power of Light and Forgiveness

2min

From Darkness to Light: A Journey of Transformation

14min

Embracing Transformation: From Darkness to Light

3min

The essence of Christianity is arguing with yourself. What makes you an effective Christian is that you’re continually arguing with yourself, and you’re winning the argument.

Because of what Christ did, God can restore the world and restore everything if we come to him through Christ. And in Ephesians 5, Paul uses the imagery of darkness and light to argue with us about how we need to be living: “For you were once darkness, but now you are light in the Lord.” If you don’t get the verse right, you’ll never win the argument.

To understand this, we have to understand what the Bible means when it talks about light and darkness in spiritual terms. It means: 1) God is truth, 2) God is righteousness, and 3) a mark of somebody who has crossed from darkness to light is that they become more of a servant.

This sermon was preached by Dr. Timothy Keller at Redeemer Presbyterian Church on May 26, 1991. Series: Christian Lifestyle. Scripture: Ephesians 5:8-14.

Today's podcast is brought to you by Gospel in Life, the site for all sermons, books, study guides and resources from Timothy Keller and Redeemer Presbyterian Church. If you've enjoyed listening to this podcast and would like to support the ongoing efforts of this ministry, you can do so by visiting https://gospelinlife.com/give and making a one-time or recurring donation.

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