The books commonly called the “Catholic Apocrypha” or “Deuterocanonical Books” — such as Tobit, Judith, Wisdom of Solomon, Sirach (Ecclesiasticus), Baruch, 1–2 Maccabees, and additions to Esther and Daniel — were generally not accepted into the Hebrew canon by most Jewish communities, nor by most early believers, for several major reasons.
First, the question of prophetic authority mattered. The Tanakh was understood to contain writings connected to recognized prophets or inspired figures from the prophetic era. Several apocryphal books were written after what many Jews considered the close of the prophetic age, roughly after the ministries of Haggai, Zechariah, and Malachi. Even 1 Maccabees itself notes a period when “there was no prophet in Israel,” suggesting awareness that prophetic revelation had ceased.
Second, many of these books were not preserved in Hebrew or widely circulated among the Jewish communities responsible for preserving the Scriptures. Some survived mainly in Greek through the Septuagint tradition. They may have been heavily influenced by Hellenism. While fragments of a few books were later found in Hebrew or Aramaic among the Dead Sea Scrolls, they still were not generally treated as Scripture within mainstream Jewish canon tradition.
Third, doctrinal and historical concerns caused hesitation. Some passages appeared to conflict with teachings found elsewhere in Scripture or contained historical difficulties, many since were proven as errors. Examples often cited include prayers for the dead in 2 Maccabees, apparent support for almsgiving as atonement for sins in Tobit and Sirach, chronological or geographical inaccuracies, and legendary-style storytelling [Hellenistic mythology language] that differed from the style of the Torah, Prophets, and Writings.
Fourth, these books were not universally received in the early congregations. While some early believers read them for instruction or moral encouragement, many distinguished them from the inspired Scriptures. Early writers such as Jerome argued that the Hebrew canon should remain the standard and referred to these books as useful for reading but not for establishing doctrine. Others, especially in Greek-speaking communities, used them more freely.
Finally, the formal acceptance of these books into the Roman Catholic canon came much later at the Council of Trent during the Reformation era, partly in response to Protestant rejection of them. Reformers generally returned to the Hebrew canon used in Judaism and treated the apocryphal books as valuable historical or devotional writings rather than inspired Scripture.
Because of these issues — uncertain prophetic origin, limited acceptance in Jewish canon tradition, doctrinal concerns, inconsistent early reception, and later formal canonization — many believers historically concluded that the Catholic apocryphal books should not be considered equal to the canonical Scriptures. We agree, having studied this matter out at length.