The prisoners often lived on small rations of potato peel soup and stale bread. One day a prisoner managed to obtain a sparkling white sugar cube. He showed it proudly to the other prisoners whose eyes widened at its sight. The prisoner, however, decided to not eat it, and carefully gave it to another who had been in the cell longer and was in more fragile health.
The others looked with astonishment as the frail prisoner also gave it another he felt more deserving than himself. And so it happened that the sugar cube went from prisoner to prisoner, and from cell to cell never to be consumed.