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 Przemysl Bishop Kostyantyn Chekhovych, he began the philosophical and theological studies in Rome.

[6] As bishop, he worked to improve the church's educational system and supported monastic orders.

[7][8] At the end of World War II, Communist Poland assisted the Soviet Union with the liquidation of the Ukrainian Greek Catholic Church.

[1][9] The relics of Josaphat Kotsylovsky are kept in the church of the Annunciation of the Blessed Virgin Mary in Stryi.