In John 13, Jesus demonstrates the depth of his love by washing the feet of his disciples before his departure, highlighting the importance of serving others humbly and lovingly. He emphasizes that true discipleship involves recognizing the necessity of receiving his love and then extending that love to others, as exemplified by their shared purpose of serving one another. The teachings draw from various theological reflections, suggesting that love is not just a duty but an emotional investment in the well-being of others, ultimately inspired by God's love for humanity.