How do we know that believers are transformed by love?

Transformation in a believer's life is evidenced by the way they love and treat others. They do not merely speak of love but also act it out, showing kindness, patience, and selflessness as outlined in 1 Corinthians 13. The new heart given to believers enables them to exhibit this divine love, distinguishing them as the children of God. Faith without works is dead, signifying that true transformation is demonstrated through loving actions towards God and others, affirming their connection to Christ.