He joined the family business and worked for his father as a sailor. One one of his trips, he visited Mount Athos, where he became a monk and stayed at the Monastery of Vatopaidi taking on the name of "Joachim".
While blessed Papoulakis was praying for the unfortunate state of all humanity, he was informed by Divine Grace about this man’s plan and immediately set off to meet and restrain him. Walking quietly and carefully, the Elder silently and suddenly approached the would-be murderer, who was poised with his finger on the trigger. Having disarmed him, he gave him a severe reprimand, reminding him of the consequences of murder in both the present and the future life. As soon as he brought him to his senses, he told him they were going home. He did not take him, however, to his own home, but to the home of his enemy, whom he had narrowly missed killing. At this meeting, with fatherly concern and true affection, the blessed peacemaking Elder brought about their reconciliation; afterwards, he instructed that a meal be prepared. Thus, through the miraculous intervention of Papoulakis, a lasting peace was restored between enemies whose differences would have been resolved with death." (http://vatopaidi.wordpress.com/2009/09/09/papoulakis-saint-joachim-of-vatopaidi-9/)