St. Basil the Great/ (c.330-379) "We know our God in His energies. For although His energies descend to us, His essence remains inaccessible." (Letter 234, PG.32, col.869)

St. Gregory of Nyssa/ (c. 335-390) Known as Father of the Fathers, he notes that "to participate in these deifying energies are intelligible creatures, i.e., the angels - pure images, to whom the soul is likened. But God remains unknown in Himself, incomprehensible in His nature." (Oracle XXVIII, 4, PG.36, col.32)

St . John Chrysostom/ (344-407) He reminds us that all that can be seen of God pertains to His condescension [through His energies] and not to the vision of His pure essence." (cf. On St. John 15, I, PG.59, col.98)

St. Cyril of Alexandria/ (370-444) All God's Uncreated Energies originate in the Father, being communicated by the Son in the Holy Spirit. (cf. 'De Sancta Trinitate, dialogue VI', PG.LXXXV, 1056A)

St. John Damascene/ (c.675-750) "By nature [essence] God is above being and knowledge. What we say of God affirmatively does not indicate His nature, but His attributes [or energies]." (cf. Ch.IV, PG.94, col.800)