After venerating the Shroud of Turin, Pope Benedict XVI said:
the Shroud is the icon of this mystery, the icon of Holy Saturday. It is in fact a winding sheet, which covered the corpse of a man who was crucified, corresponding to everything that the Gospels say of Jesus, who was crucified about noon and died at about 3 in the afternoon.
He then gives this meditation:
This is the mystery of Holy Saturday! It is from there, from the darkness of the death of the Son of God, that the light of a new hope has shone: the light of the Resurrection. And it seems to me that looking upon this cloth with the eyes of faith one perceives something of this light. In effect, the Shroud was immersed in that profound darkness, but it is luminous at the same time; and I think that if thousands and thousands of people come to see it -- without counting those who contemplate copies of it -- it is because in it they do not see only darkness, but also light; not so much the defeat of life and love but rather victory, victory of life over death, of love over hatred; they indeed see the death of Jesus, but glimpse his resurrection [too]; in the heart of death there now beats life, inasmuch as love lives there.
This is the power of the Shroud: from the countenance of this “Man of sorrows,” who takes upon himself man’s passion of every time and every place, even our passion, our suffering, our difficulties, our sins -- “Passio Christi. Passio hominis” -- from this moment there emanates a solemn majesty, a paradoxical lordship. This face, these hands and these feet, this side, this whole body speaks, it is itself a word that we can hear in silence.
How does the Shroud speak? It speaks with blood, and blood is life! The Shroud is an icon written in blood; the blood of a man who has been scourged, crowned with thorns, crucified and wounded in his right side. Every trace of blood speaks of love and of life. Especially that large mark near the side, made by blood and water that poured copiously from a great wound caused by a Roman spear, that blood and that water speak of life. It is like a spring that speaks in silence, and we can hear it, we can listen to it, in the silence of Holy Saturday.
Dear friends, let us praise the Lord always for his faithful and merciful love. Departing from this holy place, we carry in our eyes the image of the Shroud, we carry in our heart this word of love, and we praise God with a life full of faith, of love and of charity.
source: http://www.zenit.org/article-29116?l=english