Early Life and Monastic Path
Athanasius was born in 1597 to a Lithuanian nobleman in Brest, within the territory of the Polish-Lithuanian Commonwealth. His education encompassed ancient and modern languages, the writings of the Church Fathers, and works of Western philosophers, and he supported himself for a period as a private tutor before turning to the monastic life.
In 1627 he entered the Monastery of the Holy Spirit in Vilnius. He later moved to the monastery at Kupyatitsk near Minsk in 1637, where he was ordained a priest. According to the tradition, while seeking a benefactor for his monastery he prayed before the Kupyatitsk Icon of the Mother of God, and the account relates that he was directed to seek aid from the tsar in Moscow.