Early life and entry into monasticism
According to his life as preserved in Orthodox sources, Basilisk was born about 1740 in the village of Ivanish, in the Kalyazin district of the Tver Governorate, into a peasant family. His parents, Gabriel and Stephania, raised their three sons in piety, and from childhood he knew hardship and learned humility.
Although he was at first married, he left family life with his wife's consent to pursue the monastic path. He first lived as a hermit in the forests of Chuvashia, keeping constant prayer and severe asceticism, before coming under the guidance of Elder Adrian in the Bryansk forests. There he was tonsured into the mantiya by Elder Adrian and given the name Basilisk. When Adrian departed to restore the Konevets Monastery, Basilisk remained behind, enduring intense spiritual temptations.