"Throughout the history of the living, the origins of anything new have always been small, practically invisible, and easily overlooked. The Lord himself has told us that 'heaven' in this world is like a mustard seed, the smallest of all the seeds (Mt. 13:31-32), yet contained within it are the infinite potentialities of God. In terms of world history, Jesus' Resurrection is improbable; it is the smallest mustard seed of history.
"This reversal of proportions is one of God's mysteries. The great--the mighty--is ultimately the small. And the tiny mustard seed is something truly great. So it is that the Resurrection has entered the world only through certain mysterious appearances to the chosen few. And yet it was truly the new beginning for which the world was silently waiting. And for the few witnesses--precisely because they themselves could not fathom it--it was such an overwhelmingly real happening, confronting them so powerfully, that every doubt was dispelled, and they stepped forth before the world with an utterly new fearlessness in order to bear witness: Christ is truly risen."
--Benedict XVI, Jesus of Nazareth--Holy Week: From the Entrance into Jerusalem to the Resurrection (Ignatius Press, 2011), pp. 247--248