Pope Benedict XVI, Address to the participants in the International Congress on Natural Moral Law, Clementine Hall, Monday, 12 February 2007

"The capacity to see the laws of material being makes us incapable of seeing the ethical message contained in being, a message that tradition calls lex naturalis, natural moral law .  .  . Human freedom is always a freedom shared with others. It is clear that the harmony of freedom can be found only in what is common to all: the truth of the human being, the fundamental message of being itself, exactly the lex naturalis.  And how can we not mention, on one hand, the demand of justice that manifests itself in giving unicuique suum and, on the other, the expectation of solidarity that nourishes in everyone, especially if they are poor, the hope of the help of the more fortunate?"