Gilles Quispel was a Dutch

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

 theologian, and historian

Historian

A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time. If the individual is...

 of Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

 and Gnosticism

Gnosticism

Gnosticism is a scholarly term for a set of religious beliefs and spiritual practices common to early Christianity, Hellenistic Judaism, Greco-Roman mystery religions, Zoroastrianism , and Neoplatonism.A common characteristic of some of these groups was the teaching that the realisation of Gnosis...

. He became professor emeritus of early Christian history at Utrecht University

Utrecht University

Utrecht University is a university in Utrecht, Netherlands. It is one of the oldest universities in the Netherlands and one of the largest in Europe. Established March 26, 1636, it had an enrollment of 29,082 students in 2008, and employed 8,614 faculty and staff, 570 of which are full professors....

.

After studies at Leiden and Groningen, his 1943 doctorate at Utrecht was on Tertullian

Tertullian

Quintus Septimius Florens Tertullianus, anglicised as Tertullian , was a prolific early Christian author from Carthage in the Roman province of Africa. He is the first Christian author to produce an extensive corpus of Latin Christian literature. He also was a notable early Christian apologist and...

's sources. He worked on the Gospel of Thomas

Gospel of Thomas

The Gospel According to Thomas, commonly shortened to the Gospel of Thomas, is a well preserved early Christian, non-canonical sayings-gospel discovered near Nag Hammadi, Egypt, in December 1945, in one of a group of books known as the Nag Hammadi library...

, and was closely associated with the editing of the Nag Hammadi Library

Nag Hammadi library

The Nag Hammadi library is a collection of early Christian Gnostic texts discovered near the Upper Egyptian town of Nag Hammadi in 1945. That year, twelve leather-bound papyrus codices buried in a sealed jar were found by a local peasant named Mohammed Ali Samman...

. He became quite famous after one of his statements with regard to gnosticism and early Christianity: "Gnosticism is about to become the 21st century world religion," having in view that most scholars and young researchers manifest a great interest in this religious-philosophical system, focused on esoteric knowledge as means of salvation,during a summer seminar at the University of Amsterdam, in 2000.

Works

• ,,Gnosis als Weltreligion
• ,, Gnostic Studies,2 vols., Istambul,1974.
• Tatian
  Tatian
  Tatian the Assyrian was an Assyrian early Christian writer and theologian of the 2nd century.Tatian's most influential work is the Diatessaron, a Biblical paraphrase, or "harmony", of the four gospels that became the standard text of the four gospels in the Syriac-speaking churches until the...
  
   and the Gospel of Thomas: Studies in the History of the Western Diatessaron
  Diatessaron
  The Diatessaron is the most prominent Gospel harmony created by Tatian, an early Christian apologist and ascetic. The term "diatessaron" is from Middle English by way of Latin, diatessarōn , and ultimately Greek, διὰ τεσσάρων The Diatessaron (c 160 - 175) is the most prominent Gospel harmony...
  
  (1975)
• Jewish and Gnostic Man (1986)
• Gnostica, Judaica, Catholica