Many people today know of the Philokalia, a compilation of mystical, ascetic texts from the ancient Christian tradition which contain teachings on unceasing prayer, interior silence, unseen warfare, and prayer of the heart. The spiritual Elder who discovered these lost teachings and helped others attain union with God through them was Blessed Paisius Velichkovsky.
This out-of-print title is even more valuable because we have it in hard-back!
