When the Pharisees heard that Jesus had silenced the Sadducees, they gathered together, and one of them, a scholar of the law, tested him by asking, “Teacher, which commandment in the law is the greatest?” Jesus said to him, “You shall love the Lord, your God, with all your heart, with all your soul, and with all your mind. This is the greatest and the first commandment. The second is like it: You shall love your neighbor as yourself. The whole law and the prophets depend on these two commandments.”
Everything that we believe, all that the Church teaches us about how to live is summed up in and based on these two great commandments. Jesus is the Lord of Love, and if we wish to follow him, we must love as He commands. This command requires such complete and utter selflessness. The perfect example of this humble submission to the law of love is Jesus himself. His love lead Him all the way to the cross, where He suffered and died for us. He is our model and our proof that Love exists. In Him, and from Him we find strength to overcome our selfish inclinations.