Das A und O
German
Pronunciation
Das A und O
Literal Translation
The A and the O.
Description
Means the essential, the most important core of a thing. One may say, for example, "Sicherheit(Safety) ist das A und O"
historically from the book of revelation 1.8 "I am the Alpha(A) and the Omega(O),”
Equivalents
This is how you express this idiom across languages and locales.
No equivalent idioms across languages yet...