A Ukrainian by birth, Pyotr Velichkovsky was born in Poltava, where his father Ivan was a priest. At the age of 17 he took monastic vows and went to Mount Athos, where he established a separate hermitage for himself and his followers.
In 1764 Prince Ghika of Moldova asked Paisius to revive the monastic life in his country. Thereupon Paisius and 64 other monks went to Jassy. While living in Moldavia, Paisius administrated several cloisters, notably the one at Neamt.
Paisius wrote theological epistles to his disciples and translated into Russian a great number of Greek theological writings, including the Philokalia. He exerted immense influence on the startsy of the Optina Monastery both through his translations and through his personal disciples, such as Feodor Ushakov.
- "The enemy likes to hide the truth and to mix good with evil. But how can one find out the truth? God's goodwill and all our intentions are meek, full of good hope, and undoubting. Not only in our good deeds, but also in our lawlessness, God endures long with meekness and awaits our repentance. And how can one distinguish the impulse of the enemy? The enemy usually hinders us and turns us away from good. However, if in anything which apparently is good, the mind is disturbed and causes us disturbance, banishes the fear of God, deprives us of calmness, so that without any reason the heart aches and the mind wavers, then know that this is an impulse from the enemy and cut it off."