Ammon came to Poemen, and said to him, 'If I go to my neighbour's cell, or if he comes to mine, we are both afraid of telling each other silly tales which may harm our monastic purpose.' The hermit said to him, 'You are right. Young men need to be on their guard.' Ammon asked him, 'What about old men?' Poemen said to him, 'Old men who make progress and are stable, do not find frovolous words in their mouths and so they do not say them.'