Christians are called to walk in the light of the Lord, but what is this light? How is it manifested? What is the difference between a good, moral person and someone who is a Christian? In this sermon on Ephesians 5:9–10 titled “The Fruit of Light,” Dr. Martyn Lloyd-Jones shares that the Christian has a knowledge of the Lord that they lacked before— they now have a knowledge and understanding of spiritual truth. A Christian is one who knows God intimately, beyond mere intellectual assent to the truth of His existence. They also now have a heart that desires to know God more and follow His commands. They desire holiness. Next, this light is manifested in the will—rather than works of darkness, their life exhibits the fruits of righteousness. Dr. Lloyd-Jones points out a key fact about the difference between “works” and “fruit.” Fruit signifies growth, and it signifies that it is occurring naturally. Thus, Paul is writing that a believer will have a desire to please the Lord flowing out of themselves naturally because Christ is life. Fruit is the expression of that in which Christians are rooted, as a believer is rooted in Christ. Listen as Dr. Lloyd-Jones illustrates the importance this can have for the Christian walk, and why it is such a tragedy that the church is often filled with more works than it is with fruit.

http://www.mljtrust.org/sermons/the-fruit-of-light/