The blind leading the blind
"The blind leading the blind" is an idiom and a metaphor in the form of a parallel phrase, it is used to describe a situation where a person who knows nothing is getting advice and help from another person who knows almost nothing. It can be traced back to the Upanishads, which were written between 800 BCE and 200 BCE.
Abiding in the midst of ignorance, thinking themselves wise and learned, fools go aimlessly hither and thither, like blind led by the blind.
Suppose there were a row of blind men, each holding on to the one in front of him: the first one doesn't see, the middle one doesn't see, the last one doesn't see. In the same way, the statement of the Brahmans turns out to be a row of blind men, as it were: the first one doesn't see, the middle one doesn't see, the last one doesn't see.— Canki Sutta (MN 95)
"Every plant that my heavenly Father has not planted will be pulled up by the roots. Leave them; they are blind guides [of the blind]. If a blind man leads a blind man, both will fall into a pit."— Matthew 15:13-14
"Nor does the non-expert teach the non-expert - any more than the blind can lead the blind."
The phrase appears in Adagia, an annotated collection of Greek and Latin proverbs, compiled during the Renaissance by Dutch humanist Desiderius Erasmus Roterodamus. The first edition, titled Collectanea Adagiorum, was published in Paris in 1500 CE. 
References in popular culture
In a notable episode of Sex and the City Samantha tells Carrie that giving her advice is like 'the blind leading the blind'.
- أعمى يقود أعمى Arabic
- کوری عصاکش کور دگر (Persian)
- τυφλός τυφλόν ὁδηγεῖ Greek (classical)
- caecus caeco dux Latin
- Слепой ведет слепого Russian
- Vak vezet világtalant Hungarian
- L'aveugle conduisant l'aveugle French
|Wikimedia Commons has media related to The Blind Leading the Blind.|
- "What does 'Blind leading the blind' mean? - Idiom Definition". UsingEnglish.com. Retrieved 2017-11-27.
- "Meaning of the phrase blind leading the blind at dictionary.cambridge.org".
- Gary Martin. "'The blind leading the blind' - the meaning and origin of this phrase". phrases.org.uk. Retrieved 2017-11-27.
- Juan Mascaró (tr), The Upanishads, Penguin Classics, 1965, ISBN 0-14-044163-8, p. 58.
- Canki Sutta (Majjhima Nikaya 95) Archived index at the Wayback Machine., translated by Thanissaro Bhikkhu
- Sullivan, Margaret A. (September 1991). "Bruegel's Proverbs: Art and Audience in the Northern Renaissance". The Art Bulletin. College Art Association. 73 (3): 431–466, 463. doi:10.2307/3045815. JSTOR 3045815.
- Sextus Empiricus, Outlines of Scepticism (tr. J Annas and J Barnes), Cambridge University Press, 2000, ISBN 978-0-521-77809-1, book III: 259
- https://archive.org/details/proverbschieflyt00blaniala Proverbs taken chiefly from the Adagia (1814)