The day after the apostle arrived in Ephesus, a philosopher named Crato called the people together in the public square to show them how they should despise the world. He had ordered two young men, brothers and very rich, to sell their entire patrimony, to buy the most priceless gems with the proceeds, and to smash them to bits while everybody watched. The apostle, however, happened to be passing, and he called the philosopher and denounced this sort of contempt to the world, citing three reasons. For the one thing it wins the praise of men but is condemned by divine judgment. For another, such contempt cures no vices and therefore is worthless, as any medicine that never cures a disease is said to be worthless. Thirdly, contempt of riches is meritorious only when they are given away to the poor, as the Lord said to the rich young man: ' If you wish to be perfect, go and sell all you have and give to the poor.'
Hearing this, Crato replied: 'If your master is truly God, and if it is his will that these gems should benefit the poor, then you put them together again, thus winning glory for him as I have won the applause of men.' Saint John gathered the fragments of the gems in his hand and prayed; and the stones were restored to their former shape. At this the philosopher and the two young men believed and they sold the gems to give money to the poor.
J. de Voragine, Readings on the Saints