Taqwa's core image, an inward awareness of God that governs conduct even where no external authority is watching, has structural parallels in the other Abrahamic traditions, and comparing them clarifies what is distinctive about the Islamic formulation.
Jewish tradition speaks of yirat shamayim, fear of Heaven, glossed classically not as terror but as the awareness that governs conduct in private exactly as in public, expressed in the teaching that "everything is in the hands of Heaven except the fear of Heaven" (Berakhot 33b): even where a person's other qualities are given by God, this disposition is left to the person's own cultivation, an emphasis structurally close to taqwa's status as an interior, self-cultivated guard against wrongdoing.
The Hebrew Bible's wisdom literature makes "the fear of the LORD" the foundational category of Israelite ethical wisdom, "the beginning of wisdom" (Proverbs 9:10), and Christian tradition inherited the vocabulary while working to soften its apparent harshness, distinguishing a servile fear of punishment from a filial fear proper to a child's reverence for a parent, a distinction Sufi writers make independently about taqwa, contrasting a beginner's fear-driven avoidance of sin with an advanced practitioner's love-driven vigilance that no longer needs fear as its motive.
What taqwa adds to this shared structure is the specific Qur'anic move, noted elsewhere in this collection, of making taqwa rather than lineage, wealth or nationality the sole standard of human worth before God (49:13), a claim receiving a concentration and explicitness in Qur'anic rhetoric that the comparable Jewish and Christian vocabularies do not develop with quite the same emphasis.