How do we know that Christ's command to love is true?

The truth of Christ's command to love is grounded in His own example, particularly in John 15:13, where He states, 'Greater love hath no man than this, that a man lay down his life for his friends.' This self-sacrificing love is the ultimate demonstration of love. The command is not simply a moral obligation but is rooted in the intimate relationship He shares with His followers, where He calls them friends and not servants. Thus, this command reflects the very nature of Christ's love, urging believers to exhibit such sacrificial love toward one another.