No one has greater love than the one who gives his life for his friends. The Evangelist John presents the bloody death of His Son on the Cross as the culmination of the love of God (Father) to man, which is also the greatest proof of the love of God for humanity. This is the source of Christian love! Precisely from the Cross Jesus urges his disciples to go towards the neighbour, to discover his mysterious presence in the service to the last ones of the earth: who are persecuted, naked, ill, hungry, in prison, foreigner or slave.
Love not with words but with facts, this is the quality of the love that guarantees the authenticity of a Christian and causes that love does not downgrade to mere sentimentality. Because a living faith is also an active faith, it is measured on the yardstick of charity and incites to engage in concrete situations by fighting the temptation to seek refuge in the private sphere and closing the ears in front of the cry of the poor against injustice.
But we need to be poor in order to understand the poor, because poverty affects all. This truth becomes visible only in Jesus Christ, the human poverty, and what a life free and full of love, justice and solidarity towards men means. With his sacrifice, Jesus raises the human poverty, marked by the limit, by the fragility, by the sin and by death, to communion with God: the incarnation has this dimension of the restoration of the true image of God in man. As image of God men are elevated in the sonship, as brothers of Jesus, and the father of Jesus becomes also the father of all men. God involves himself in this relationship in the entirety of his Trinitarian being, in this prayer which becomes constitutive, interior, ontological, this is a relationship which is a gift of the Holy Spirit.
In the love of the neighbour that can be seen, man lives also the love of God which is not seen: it is the realization of the unity between brothers and with God, which identifies himself with the neighbour, which is the source of all love that circulates among men. Every time that we talk about love, in fact, the believer knows that the source of this love is God: God is love. The love of God has been given to human beings in the Son (Jesus), dead and risen, and it is through the Holy Spirit that men are capable of loving in the measure of the gift received. The Christian, through the sacraments, may live the love in everything he does, in his daily choices. He can participate in all the thoughts and sentiments of Jesus, like Mary, the one full of grace and virtue, the one selected among all creatures, in which the vocation of every man is realized, the one of participating in the heavenly life.