Some of the Apocrypha (e.g., Judith, Tobit) may have been written already in the Persian period (6th–4th century bce), but, with these possible exceptions, all the Apocrypha and Pseudepigrapha were written in the Hellenistic period (c. 300 bce–c. 300 ce). Yet the influence of Persian culture and religion sometimes can be detected even in comparatively late Jewish works, especially in Jewish apocalyptic literature (see below Apocalypticism). The Persian influence was facilitated by the fact that both the Jewish and Persian religions are iconoclastic (against the veneration or worship of images) and opposed to paganism and display an interest in eschatology (doctrines of last times).

Although such an affinity did not exist between Judaism and Hellenistic culture, literary activity among Hellenistic Jews was generally Greek in character: the Greek-writing Jewish authors thought mainly in Greek concepts, used genuine Greek terminology, and wrote many of their works in Greek literary forms.

Though Hellenistic Jewish authors sometimes imitated biblical forms, they learned such forms from their Greek Bible (the Septuagint). Many Greek products written by Jews served as religious propaganda and probably influenced many pagans to become proselytes, or at least to abandon their heathen faith and become “God-fearing.” Thus, the Jewish literature written in Greek could be used by Christianity for similar purposes later.

Greek influence on Jewish writings written in Hebrew or Aramaic in Palestine in the intertestamental period was by no means as significant as upon Jewish works written in Greek among the Hellenistic Diaspora (Jews living outside Palestine). In Palestine, religion and culture formed a unity, and the Hellenization of the upper classes in Jerusalem before the Maccabean wars (167–142 bce) was restricted to some families who had accepted Greek civilization for practical purposes. Jews in Palestine developed a flourishing autonomous culture based upon religious ideals. Living without interruption in their powerful religious tradition and with their own non-Greek education, the Palestinian Jews were able to produce literary works without significant evidences of Greek influence. The language of this literature was both Aramaic and Hebrew. Under the national revival in the Maccabean period, Hebrew became prevalent as the language of Jewish literature in Palestine; but since Aramaic was a spoken language in Palestine during the whole period, some of the extant literary works of Palestinian Jews in the Maccabean and Roman period probably were originally written also in Aramaic.

Apocalypticism

In intertestamental Jewish literature a special trend developed: namely, apocalypticism. Apokalypsis is a Greek term meaning “revelation of divine mysteries,” both about the nature of God and about the last days (eschatology). Apocalyptic writings were composed in both Judaism and Christianity; one of them (the Book of Daniel) was accepted in the Jewish canon and another (the book of Revelation) in the New Testament. Other apocalypses form a part of the Pseudepigrapha, and influences of apocalypticism or similar approaches are found in some of the Apocrypha. The sectarian Dead Sea Scrolls are the works of an apocalyptic movement, though not all are written in the style of apocalypses. The Sibylline Oracles are, in their Jewish passages, a part of Jewish Hellenistic literature; inasmuch as they contain eschatological prophecies of future doom and salvation, they are apocalyptic, but in their polemics against idolatry and their apology for Jewish faith, they are a product of Jewish Hellenistic propagandistic literature. Because one of the central themes of apocalypticism is that of future salvation, messianic hopes involving the advent of a deliverer are usually the object of intertestamental Jewish apocalypticism.

Apocryphal works indicating Persian influence