First John is essentially a series of tests through which professing Christians can examine themselves to see if they are true Christians. John knew how important that assurance of salvation was in his day, and it is equally important for us today.

The Bible teaches that true Christians are those who have repented of their sins and believed in the Lord Jesus Christ. The Bible also teaches that you can have assurance of your salvation by examining whether you truly love God and His people.

Unfortunately, today there is much confusion surrounding the doctrine of the assurance of salvation, so it is necessary that we as Christians know and understand the key biblical presuppositions as they relate to this important doctrine.

In 1 John 3 the apostle John makes a definitive statement as it relates to salvation: He says that you must believe in the name of God’s Son, Jesus Christ. John is saying that the only possible way of salvation is through the Lord Jesus Christ. But there are several key truths that you must believe in order to be saved, and John lays them out clearly in 1 John 3:23.

According to the apostle John, whoever claims to be a Christian must consistently live a life characterized by holiness and love. In particular, Christians must demonstrate a biblical love for God and a biblical love for His people.

Unfortunately, professing Christianity is filled with many false teachings and misrepresentations about the third member of the Trinity, the Holy Spirit. But the Holy Spirit plays a vital role in the believer's assurance of salvation, so it is important to understand the Bible’s teaching on this issue.

The Bible teaches that loving God and loving others is a sign of true salvation. No place is that better explained than in 1 John, chapter 3. In this compelling chapter John gives a specific test that every professing Christian must take in order to determine whether they are truly saved.

In John chapter 3 the apostle John draws several crucial conclusions about how love, or the absence of love, confirms the true condition of the professing Christian's heart. Those who truly love God and His people can be said to have passed from spiritual death to spiritual life.

In this magnificent chapter the apostle John gives every professing Christian a test to determine whether they are a true Christian. He explains that if you are a professing Christian and you are ruled by an angry, hateful, murderous spirit—especially toward believers—you do not have eternal life in Jesus Christ.