In today's Gospel reading from John 15, Jesus said to his disciples, "As the Father loves me, so I also love you. Remain in my love. If you keep my commandments, you will remain in my love, just as I have kept my Father's commandments and remain in his love. I have told you this so that my joy might be in you and your joy might be complete." Basically, Jesus is taking about union with him, what he desires.