Resource Why it matters Best use LLT The best Latin search environment across authoritative editions, with lemma-aware tools. Latin phrase and reuse searches. Vetus Latina Database No substitute exists when Old Latin patristic Bible citations matter . Distinguish Old Latin from Vulgate reception. CCSL / CCSG / CSEL / GCS / Sources Chrétiennes These are the main scholarly edition series, not just convenient corpora. Final academic text and citation. Patrologia Latina Database Still useful for large-scale searching, Migne pagination, and full-text retrieval. Broad reconnaissance and citation history. Patrologia Graeca database access via libraries Useful when institutional facsimile searching is available and scans are better controlled than ad hoc web copies. Institutional PG access. Acta Sanctorum Database Searchable hagiographic corpus with BHL numbers. Reception history and saints’ literature. JSTOR Strong for journal literature and also for some primary-source collections, but not the main route to patristic texts themselves. Secondary scholarship, reviews, and contextual articles. Project MUSE Strong for books and journals from university presses, including patristics and historical theology scholarship. Secondary scholarship and book chapters. Brill and De Gruyter Important publisher platforms for monographs, journals, and scholarly series, more than for verse-indexed discovery. Monographs, journals, and publisher-side access to scholarly editions. Google Scholar sits in the middle. It is free and very useful, but it is a discovery tool, not a curated patristic corpus. It is best used to find editions, reviews, dissertations, and library-held versions of works already identified elsewhere. Reliability and editorial judgment Migne remains useful because it is broad, often public domain, traditionally cited, and sometimes still the easiest way to reach texts that do not yet have a modern replacement. But it should not be confused with a modern critical edition. The Patrologia Latina Database explicitly reproduces the first Migne edition, and CCSG explicitly states that it was created to replace PG, which “no longer fulfils the requirements of modern scholarship.” By contrast, CCSL, CSEL, and Sources Chrétiennes define themselves in terms of critical editing, apparatus, and manuscript-tradition analysis. That difference has very practical consequences. Use Migne, New Advent, DCO, Patristica.net scans, Google Books, or Internet Archive when you need to answer questions such as: “Does this author discuss this verse 28 26 52 53 54 55 56 57 58 59 60 11