Irenaeus [taught] that the glory of God is seen in a living human being.  Let the light of that glory shine so brightly that everyone may come to recognize the inestimable value of all human life. Even the weakest and most vulnerable, the sick, the old, the unborn and the poor, are masterpieces of God’s creation, made in his own image, destined to live forever, and deserving of the utmost reverence and respect.

Source: Spoken at the Vatican City, July 17, 2013