http://www.zenit.org/article-21177?l=english
snip
Redemption
The Pope, as he also did in the encyclical, observed that the "development of modern science has confined faith and hope more and more to the private and individual sphere, so much so that today it appears in an evident way, and sometimes dramatically, that the world needs God -- the true God! -- otherwise it remains deprived of hope."
"Science contributes much to the good of humanity -- without a doubt -- but it is not able to redeem humanity," he continued. "Man is redeemed by love, which renders social life good and beautiful.
"Because of this, the great hope, that one that is full and definitive, is guaranteed by God, by God who is love, who has visited us in Jesus and given his life to us, and in Jesus he will return at the end of time. It is in Christ that we hope and it is him that we await!"
The Holy Father concluded his address with an invitation to live this hope in Advent "with works of charity, because hope, like faith, is demonstrated in love."
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I just love this man, the Holy Father.