About

Selecting scripture passages at random removes confirmation bias from devotional reading. Readers naturally gravitate toward familiar passages, which narrows exposure to roughly 15% of any given text over a lifetime. This generator draws from a curated corpus spanning six major traditions - King James Bible, Quran (Sahih International translation), Torah (Tanakh selections), Bhagavad Gita, Dhammapada, and Tao Te Ching - using a cryptographically seeded selection function (crypto.getRandomValues) rather than the statistically weaker Math.random. A no-repeat buffer ensures every passage surfaces before any is shown twice.

The tool approximates uniform distribution across selected sources. Note: passage counts differ greatly between texts (the Bible contains over 31,000 verses; the Tao Te Ching has 81 chapters), so enabling all sources simultaneously weights toward shorter collections per-draw. Filter to a single source for true uniform sampling within that text. Favorites persist in browser storage only - no server, no account, no tracking.

Formulas

Random passage selection uses a cryptographically secure uniform distribution. Given a filtered corpus of N passages, the index i is computed as:

i = floor(r × N)

where r ∈ [0, 1) is derived from crypto.getRandomValues producing a 32-bit unsigned integer divided by 2³²:

r = getRandomValues(1)[0]2³²

The no-repeat buffer uses a Fisher-Yates shuffle of indices [0, N − 1]. Each draw pops from the shuffled stack. When empty, the stack is reshuffled. This guarantees every passage appears exactly once per cycle. The probability of any passage appearing in position k is:

P(k) = 1N

Where N = total passages in filtered corpus, i = selected index, r = cryptographic random float, P(k) = probability of any passage at position k.

Reference Data

Sacred Text	Tradition	Language of Origin	Approx. Verses/Chapters	Estimated Composition Period	Translation Used
Bible (Old Testament)	Judaism / Christianity	Hebrew, Aramaic	23,145 verses	1200 - 165 BCE	King James Version
Bible (New Testament)	Christianity	Koine Greek	7,957 verses	50 - 100 CE	King James Version
Quran	Islam	Classical Arabic	6,236 ayat	609 - 632 CE	Sahih International
Torah (Pentateuch)	Judaism	Biblical Hebrew	5,845 verses	1200 - 400 BCE	JPS Tanakh
Bhagavad Gita	Hinduism	Sanskrit	700 shlokas	400 - 200 BCE	Eknath Easwaran
Dhammapada	Theravada Buddhism	Pali	423 verses	300 BCE	Acharya Buddharakkhita
Tao Te Ching	Taoism	Classical Chinese	81 chapters	400 BCE	Stephen Mitchell
Psalms (Bible)	Judaism / Christianity	Hebrew	150 psalms (2,461 verses)	1000 - 300 BCE	King James Version
Proverbs (Bible)	Judaism / Christianity	Hebrew	915 verses	900 - 700 BCE	King James Version
Ecclesiastes (Bible)	Judaism / Christianity	Hebrew	222 verses	450 - 180 BCE	King James Version
Upanishads (Principal)	Hinduism	Sanskrit	13 texts, variable	800 - 200 BCE	Various
Guru Granth Sahib	Sikhism	Gurmukhi	1,430 pages	1604 CE	Sant Singh Khalsa

Frequently Asked Questions

The generator pre-shuffles the entire filtered corpus using a Fisher-Yates algorithm seeded by crypto.getRandomValues(). It then iterates through this shuffled array sequentially. Once every passage has been shown exactly once, the array is reshuffled and the cycle restarts. This guarantees that within any complete cycle of N draws, each passage appears precisely 1 time, achieving a uniform distribution of 1N per passage.

Math.random() uses a pseudo-random number generator (typically xorshift128+) that is deterministic given the same seed state. While adequate for games, it can produce detectable patterns over large sample runs. crypto.getRandomValues() draws from the operating system's entropy pool (hardware interrupts, timing jitter), producing cryptographic-grade randomness. For a devotional tool where users might perceive bias in repeated patterns, this eliminates any statistical clustering artifacts.

Yes. If you enable all sources simultaneously, each individual passage has equal probability regardless of its source text. Since the Bible corpus contains roughly 100× more entries than the Tao Te Ching, any single draw is statistically likely to return a Bible verse. To achieve equal representation across traditions, use the single-source filter and rotate manually, or use the weighted mode which normalizes draw probability per source.

The King James Version (1611) is public domain worldwide. Sahih International Quran translations are freely distributed with attribution. The Dhammapada translation by Acharya Buddharakkhita is released under open license by Access to Insight. Tao Te Ching passages used here are adapted from public domain translations. The Bhagavad Gita selections draw from freely available scholarly translations. All passages in this tool are sourced from public domain or openly licensed editions.

Favorites are stored in the browser's LocalStorage under a namespaced key. They persist across sessions but are local to the device and browser profile. Clearing browser data will erase them. The tool provides a copy-to-clipboard function for individual passages. There is no cloud sync. For backup, copy your favorites manually. LocalStorage has a typical limit of 5MB, which accommodates thousands of saved passages.

Changing the source filter rebuilds the shuffled passage stack from scratch. The history of previously viewed passages is preserved for back-navigation, but the no-repeat cycle resets. This means a passage shown before the filter change may appear again in the new cycle. The history buffer retains the last 50 passages regardless of filter changes.