How do we know we have passed from death unto life?

In 1 John 3:14, it states, 'We know that we have passed from death unto life because we love the brethren.' This love is a fundamental evidence of regeneration, as a true believer experiences a transformation of heart where they begin to love those whom God loves. The passage underscores that this love is not merely a feeling but is actively expressed in our deeds and interactions with others. Moreover, those who are truly saved will demonstrate a persistent faith in Christ and will not ultimately depart from the truth of the gospel. This assurance rests on the promises of God to keep His people secure in their salvation, as highlighted in Romans 8:29-30 and John 10:28-29.