7 surviving letters between Heronius and Isidore of Pelusium, spanning c. 404–433.
If you wish to silence those who mock Christ's teaching, the most effective response is not argument but conduct.
When your own strength fails — as it will — calling on God is not weakness.
The arrogant mind cannot follow the straight path because it cannot see it.
The priesthood is a sacred trust, not a career.
The spiritual life is a journey with a beginning, a middle, and an end.
Virtue must be practiced with all one's strength — not merely admired from a distance.