Here's a June 22, 2010, letter sent by Cardinal Jorge Mario Bergoglio, then archbishop of Buenos Aires and now Pope Francis, to the Carmelite Nuns of the Archdiocese of Buenos Aires:
I write these lines to each of you who are in the four monasteries of Buenos Aires. The people of Argentina will face in the coming weeks, a situation whose outcome may seriously injure the family. This is the bill on marriage of same sex.
At stake here is the identity, and survival of the family: father, mother and children. At stake is the lives of so many children who are discriminated against in advance depriving them of human growth that God wanted was given to a father and a mother. At stake is a direct rejection of God's law, also engraved in our hearts.
Click here to read the complete letter at Globovision.com, translated by Google.