Some things are so extremely unlike—so totally opposite of each other—they are said to have a “night and day” contrast. The apostle Paul deliberately employs this graphic comparison when he pens the following words: “For you were once darkness, but now you are light in the Lord. Walk as children of light” (Ephesians 5:8).
Not only is walking in love a life of holiness (Ephesians 5:1-7), walking as a child of light is also such a life.
A child of light bears distinct fruit: “for the fruit of the Spirit is in all goodness, righteousness, and truth” (Ephesians 5:9).
A child of light has a distinct focus: “finding out what is acceptable to the Lord” (Ephesians 5:10).
A child of light has a distinct fellowship: “have no fellowship with the unfruitful works of darkness, but rather expose them” (Ephesians 5:11).
Therefore, anyone who is converted to Christ needs to awaken from his spiritual slumber, arise in newness of life from His tomb of sin, so that Christ can give him light (v. 14).
There is an obvious—night and day—difference between the sons of God who walk as children of light and the sons of the disobedience who live in darkness.