How do we know the importance of brotherly love in Christianity?

The importance of brotherly love is deeply rooted in the teachings of Jesus, especially as demonstrated through the parable of the Good Samaritan. Jesus uses this story to challenge the notion of exclusivity in neighborly love, emphasizing that one's neighbor includes everyone in need, regardless of social or cultural barriers. This parable urges Christians to embody Christ's love by acting compassionately towards all people, illustrating that true love should drive us to assist others actively. Recognizing and practicing this love is essential for living out the Christian faith and demonstrating the Gospel's transformative power.