Christianity is not just a vitamin supplement. It doesn’t just come into your life and give you a little boost to live a better form of the life you’re living. It’s a sweeping revolution that affects every part of you.

In Ephesians 5, we have a long passage on what it means to live the Christian life. And it’s not that we live in a certain way and, therefore, become Christians. It’s that we become Christians and, therefore, live in a certain way—because we’re saved not by what we do but by what Christ has done.

In this passage, there are three important keys to understanding what it means to live the Christian life. It entails 1) knowing sin and walking in obedience, 2) knowing the time and walking in wisdom, and 3) knowing the Lord and walking in joy.

This sermon was preached by Dr. Timothy Keller at Redeemer Presbyterian Church on January 8, 2012. Series: A Study of Ephesians: Who is the Church? Scripture: Ephesians 5:5–21.

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