After graduating from the elementary folk school in Lesko he studied at the Sanok and Sambir gymnasia. From 1896 he studied at the law department of Lviv University. Soon he interrupted the studio and graduated from the school of artillery in Vienna, and of 1900 he was sent to serve in the Lviv garrison. After leaving the military service, and with the assistance of the PrzemyslBishopKostyantyn Chekhovych, he began the philosophical and theological studies in Rome. He studied theology in Rome and graduated in 1907, later that year on 9 October he was ordained to the priesthood.[4] Soon after, he was made vice-rector and professor of theology at the Greek-Catholic seminary in Stanislaviv.[1]
On 10 July 1941 he welcomed the Wehrmacht forces entering Przemyśl. On 4 July 1943 Kotsylovsky led a Mass in the name of the volunteers entering the 14th SS Division.[7][8]
The relics of Josaphat Kotsylovsky are kept in the church of the Annunciation of the Blessed Virgin Mary in Stryi.
Testimony of Father Josaphat Kavatsiv
Josaphat Kavatsiv states a second hand account of Bishop Josaphat Kotsylovskyi martyrdom as following:
"I came to the Protection Monastery and the hegumena [prioress] told me the story. When Bishop Kotsylovskyi was arrested, their Orthodox bishop of Kyiv was arrested at the same time. When they brought a package to Chapaievka, the Orthodox bishop said: 'Uniate Bishop Josaphat Kotsylovskyi is confined in the same camp with me.' And he asked these nuns, if they could, to bring a package to Bishop Josaphat as well. So they brought packages- one for each of the bishops... Once when she brought a package, the bishop said that Kotsylovskyi had died. And he asked her, because the dead were all thrown into one hole, if they could borrow some money or get some money somewhere. He asked her 'to bury him in a separate grave, because this was a holy man.'"[2]
^ abTuriĭ, Oleh, ed. (2004). Church of the Martyrs: The New Saints of Ukraine. Lviv, Ukraine: St. John's Monastery, Pub. Division Svichado. ISBN966-561-345-6. OCLC55854194.
^ abPaul R. Magocsi, Ivan Ivanovich Pop. Encyclopedia of Rusyn history and culture. University of Toronto Press, 2002. p 252