the.com/guardian angel

The bodyguard you never hired, working unpaid overtime since birth.

means A protective spirit or figure believed to watch over and guide a particular person, or loosely, anyone who quietly looks out for you without being asked.

from The idea runs deep in religious and folk tradition — ancient notions of personal protective spirits appear in Greek and Roman belief (the 'genius' or 'daemon' assigned to each person), and the concept was absorbed and formalized in Christian theology, where every soul was said to be assigned an angel as watcher and guide. The English phrase itself is a straightforward pairing of 'guardian' (from Old French guarder/garder, 'to watch, keep, protect') and 'angel' (from Greek angelos, 'messenger'). So the term literally means 'protecting messenger' — a title earned honestly, not a figure of speech stretched to fit.

origin
Idea predates Christianity, found in Zoroastrianism and Babylon
catholic doctrine
Church says every person gets exactly one
feast day
October 2, officially on the calendar since 1608
job description
Protect and nudge, never override free will
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