How does the love for the brethren reflect genuine faith?

The love for fellow believers is portrayed as an essential evidence of authentic faith in 1 John 2:10, where it states that he who loves his brother abides in the light. This abiding is indicative of a life transformed by the gospel, where love becomes the guiding principle of interactions within the Christian community. The absence of such love may indicate a person is walking in darkness, disconnected from the light of Christ. This reality compels believers to examine their hearts and relationships, understanding that true faith is both personal and communal, necessitating a loving relationship with others who share that faith. Hence, loving one another is not optional but a direct reflection of one’s relationship with God through Christ.