God proves his love for us in that while we were still sinners, Christ died for us.The Solemnity of the Most Sacred Heart of Jesus which the universal Church observes today is a celebration of God's love. It is a celebration of God's love that is radiated to the world through God's Son Jesus Christ. In Jesus Christ, God's love has been expressed in its fullness (cf. John 3:16). It is a love that encompasses the entirety of Jesus' saving mission, from his birth through his passion and death and to his glorious rising from the dead. In other words, the fullness of God’s love for the created world is demonstrated in Jesus faithfully living out his incarnation: when he fed the hungry, healed the sick and forgave sinners, and when he gave his life for his brothers and sisters as he hung upon the wood of the cross (cf. Second Reading). This is the love which we call to mind every time we gather in praise and worship to celebrate the Eucharist.
In today’s first reading from the prophet Ezekiel, after castigating those whom he had appointed as shepherds (the leaders of the people) for their failure to faithfully live out their call (leading the people to fullness of life), the Lord God informs the people of his decision to take over the responsibility of shepherding the community. In a tone that mirrors that of a covenant, the Lord reiterates the tender love that he has for the people. The Lord promises to gather the scattered members of the community in order to return them to their land where he will look after them. as their shepherd, not only will the Lord lead the gathered community to greener pastures, but he will also tend to the sick and the injured. The fullness of life which the people had lacked as their languished in the different places where they were scattered will now become a possibility. The Lord will do this, not because the people had “learnt” their lesson and promised not to violate the terms of their covenant with God, but because of the Lord’s love for them. 
In the second reading, St. Paul reiterates his understanding of the Christ event (Jesus’ birth, death, and resurrection) as the culmination of the tender love that God has always had for creation. Jesus Christ, as it were, is the love of God incarnate. As a redeeming sacrifice, Jesus Christ has become the foundation upon which a new creation has been built: a creation that has been reconciled to God and subsequently put on the path to eternal life. This new creation is assured of eternal life because it has God as its shepherd (Responsorial Psalm).