Here is a review based on the content and theological significance of this volume: Content Overview
Unlike modern studies that separate theology from ethics, the Philokalia unites them. Knowledge of God is gained through a pure heart, not just intellectual pursuit. Filocalia, vol. 2
It focuses on the struggle for purification, the inner working of the mind (nous), the interpretation of scripture, and the ultimate goal of union with God (theosis). Here is a review based on the content
The volume consists primarily of St. Maximus's works, including Ambiguities (Ambigua), Questions to Thalassius , and Ascetic Life . the interpretation of scripture