Basil of Caesarea, also called Saint Basil the Great, (330 -379) was the bishop of Caesarea Mazaca in Cappadocia, Asia Minor (modern-day Kayseri, Turkey). St. Basil was born into the wealthy family of Basil the Elder, a famous rhetor,and Emmelia of Caesarea. His parents were known for their piety, and his maternal grandfather was a Christian martyr, executed in the years prior to Constantine I's conversion. The principal theological writings of Basil are his De Spirity Sancto (On the Holy Spirit), a lucid and edifying appeal to Scripture and early Christian tradition (to prove the divinity of the Holy Spirit), and his Refutation of the Apology of the Impious Eunomius, written in 363 or 364, three books against Eunomius of Cyzicus, the chief exponent of Anomoian Arianism. The first three books of the Refutation are his work; the fourth and fifth books that are usually included do not belong to Basil, or to Apollinaris of Laodicea, but probably to Didymus "the Blind" of Alexandria.

This classic exposition of Trinitarian doctrine eloquently sets forth the distinction yet perpetual communion of the divine Persons. Without explicitly calling the Spirit "God, " St Basil demonstrates that He, like the Son, is of the same nature with the Father.

This volume contains the proceedings of the Seventh International Maynooth Patristic Conference, which was held in 2008. Contents include: The Holy Spirit in the Theology of Irenaeus * Clement and Origen in Context * Cyril of Jerusalem on the Holy Spirit * Didymus the Blind's de Spiritu Sancto and the Development of Nicene Pneumatology * St. Augustine on the Place of the Holy Spirit in the Formation of the Gospels * The Holy Spirit in St. Fulgentius of Ruspe's Ad Moninum * The Holy Spirit in Isaac of Ninevah and East Syrian Mysticism * The Holy Spirit in the Ecclesiology of Photios of Constantinople * Three Modern 'Fathers' on the Filioque: Good, Bad, or Indifferent? * The Holy Spirit and the Marian Typology of St. Ambrose at Vatican II.

St. Basil was one of the most popular of the Greek Fathers amongst the Syrian churches, and his De Spiritu Sancto was twice translated into Syriac. The first version, made in the late fourth/early fifth centuries, survives the three manuscripts of the fifth-seventh centuries and is edited and translated here for the first time. It is a paraphrastic text and so is of theological interest in its own right. Its biblical citations are also noteworthy. The second translation, made in the seventh century, survives only in fragments and these have been collected from florilegia manuscripts and edited in parallel with the Greek text. Introductions to the two volumes explore the Syriac manuscript traditions of this work and their significance, and investigate St. Basil's contacts with Syriac-speaking Christians and the theology of the first Syriac version. Unusually, a detailed orthographic index of textual variants is also included.

In this volume, the study of the history of the doctrine of the Holy Spirit is carried on from the sub-apostolic writers to the end of the patristic period, which is generally held to terminate with Gregory the Great in the West and John of Damascus in the East. This is an early classic study in doctrinal development by one of the foremost exegetes of the late 19th/early 20th century.

The term Hexameron refers either to the genre of theological treatise that describes God's work on the six days of creation or to the six days of creation themselves. Most often these theological works take the form of commentaries on Genesis I.

In his commentary on Gregory of Nyssa’s Adversus Macedonianos, Piet Hein Hupsch spells out its theological structure and corresponding rhetorical arrangement. His systematic-theological synthesis explicates the Spirit’s role in the Trinity’s work of salvation. Gregory’s theology culminates in praise of the Trinity.