How do we know if we have passed from death to life?

According to 1 John 3:14, the evidence that one has passed from death to life is manifested in the ability to love fellow believers. This transformative work is accomplished by the Holy Spirit, who dwells in believers and empowers them to exhibit the fruit of love. John cautions believers not to be surprised if the world hates them, for such animosity is a reflection of their rejection of God's truth. This love is not only a duty but also a vital confirmation of a true relationship with Christ.