“By this we know that we have come to know Him, if we keep His commandments” (1 John 2:3).
True believers obey God’s commandments.
Before Jesus ascended to Heaven after His resurrection, He gave the following Great Commission to His disciples: “Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, teaching them to observe all that I commanded you” (Matt. 28:19-20). Notice that a true disciple was to observe, or obey, all of Christ’s commands.
The apostle John understood well the Lord’s instruction. He knew that obedience to the commands of God produces assurance—the confidence of knowing for sure “that we have come to know Him” (1 John 2:3). The Greek word for “keep” in that verse refers to watchful, careful, thoughtful obedience. It is not an obedience that is only the result of external pressure; it is the eager obedience of one who “keeps” the divine commandments as if they were something precious to guard. Such obedience is motivated by love, as John indicates in verse 5: “Whoever keeps His word, in him the love of God has truly been perfected. By this we know that we are in Him.” That’s supported by the word translated “commandments,” which refers specifically to the precepts of Christ rather than laws in general. Legal obedience demands perfection or penalty, while 1 John 2:3 is a call to gracious obedience because of the penalty Christ has already paid.
However, those who claim to know God and yet despise His commandments John calls liars: “The one who says, ‘I have come to know Him,’ and does not keep His commandments, is a liar, and the truth is not in him” (v. 4). “They profess to know God, but by their deeds they deny Him, being detestable and disobedient, and worthless for any good deed” (Titus 1:16).
How can you determine if you are a true Christian? Not by sentiment, but by obedience. If you desire to obey God out of gratitude for all Christ has done for you, and if you see that desire producing an overall pattern of obedience, you have passed an important test indicating the presence of saving faith.