Whatever else one thinks about immigration, it is clear that they are our brothers and sisters whom we are commanded to love, and whose well-being we are bound to protect and promote.What faith teaches about the dignity of the human person, about the sacredness of every human life, and about humanity's strengths and weaknesses helps us see more clearly the same truths that also come to us through the gift of human reason. At the center of these truths is respect for the dignity of every person. This is the core of Catholic moral and social teaching. Because we are people of both faith and reason, it is appropriate and necessary for us to bring this essential truth about human life and dignity to the public square. We are called to practice Christ's commandment to "love one another" (Jn 13:34). We are also called to promote the well-being of all, to share our blessings with those most in need, to defend marriage, and to protect the lives and dignity of all, especially the weak, the vulnerable, the voiceless.