Kammala jumla mai zuwa: A ranar 2 ga Yuli, 1654, Papczyński ya shiga kungiyar Piarist, da aka kafa a Poland, a cikin gidan su a Podoliniec kuma an ba shi sunan addini na "Stanislaus na Yesu da Maryamu". Yana yin ayyuka mafi ƙasƙanci, kamar share gidajen tumaki, yankan itace, da kuma wanke kwanuka. Ya yi shekara ta biyu ta noviciate a Warsaw, yayin da yake karatun tauhidi tare da 'yan Franciscan Recollect. Waɗannan su ne lokutan mamayewar Sweden da aka sani da "
Ruwan Tsufana", wannan ya yi tasiri sosai a rayuwar wannan matashin malamin. Daga abin da ya fuskanta a dukan rayuwarsa, ya kwatanta a cikin shaidarsa wani abin da ya faru a waɗannan kwanaki: "Na furta", ya rubuta, "ina barin wannan duniya ina furta imanin Katolika wanda na kasance a shirye na zubar da jinina a lokacin yaƙi da Sweden. Wata rana ni da abokina muna fita daga Old Town, sai wani soja ɗan ridda, da takobinsa a hannu, ya kai mana hari kusa da Dominican Fathers. Abokina (ko da yake shi Bajamushe ne) ya gudu, kuma ni, na faɗi a gwiwoyina, na tsage wuyana don bugun. Duk da haka, ta hanyar umarnin Providence na Allah, ban sami rauni ba duk da cewa an buge ni sau uku da ƙarfi. Bayan haka, na yi sa'a ɗaya da rabi ina jin zafi sosai".