Naphthali ben Levi (Henri) van Praag (September 12, 1916 in Amsterdam – November 3, 1988 in Hilversum) was a Jewish-Dutch writer, teacher, and religious historian, and became known also for his publications in the field of parapsychology.

After the war, Van Praag wanted to work for peace, and "turned [...] to people across all boundaries of religion, or national cultures.

[1] After obtaining the deed Dutch Language and Literature for secondary education (1946), he began an eagerness for several university studies: general philosophy of science, physics and pedagogy (Kohnstamm), logic (Evert Willem Beth), mathematics (L.E.J.

Brouwer), biology (Heimans), sociology (Mennicken), economics (Mermans), general linguistics (Marcel Cohen), history (Jacques Presser), Judaica (Joseph B. Soloveitchik), psychology (Otto Selz) and phenomenology of religion and cultural anthropology (Gerard van der Leeuw).

His first, not in book form, study number, time and space, (1949) deals with the psychological foundations of mathematics and physics.

One of the initiatives that emerged from the conference was the plan for a three-part series Das Lebendige Gottes Wort, an anthology with commentary from Jewish and Christian writings on revelation, prayer and promise.

With Stalin's death and the arrival of Nikita Khrushchev in 1953 compared the situation for Jews in Russia to improve, so the mission had formed the reason for the trip to South America was halted.

Van Praag also wrote the entire series of some forty articles and introductory and linking between texts and other items were the result of numerous conversations between Protestant and Catholic Christians, Jews and - to a lesser extent - Muslims.

In 1958 he became director of the center for pedagogic Psychology in Amsterdam, in 1964 he was consultant and from 1966 senior lecturer of Teleac (a relationship that until 1977 would last), (main) editor for various publishers and magazines including Studium Generale, Effective Business Management and Intermediate.

This academy was on March 15, 1979, as International University Lugano (Switzerland) continued and Van Praag was Chancellor and taught, among other methods, psychology and parapsychology.

Van Praag highlights in this field, that psychology should be seen as a border area of what is called parapsychology, as Einstein defined as a straight line curve with a degree of curvature = 0.