"The Reason of Being". Meaning, the sole or primary purpose behind a person or organization. This phrase is also found in english.
For instance:
The musician's instrument was his very raison d'être.
The "reason to be," the single, most important reason for something to have been created or done.
It is "la raison" ("the reason").
la raison (fem.)
In French, you can say "Tu es la raison pour laquelle je souris."
"Beyond reason" in English is Au-delà de la raison in French.
Le Retour à la Raison was created in 1923.
The duration of Le Retour à la Raison is 180.0 seconds.
La raison pour is a French equivalent of the incomplete English phrase "reason for... ." The phrase translates literally as "the reason for" since French employs definite articles -- in this case, la --- where English does not use "the." The pronunciation will be "la reh-zo poor" in French.
French article: le [masculine]/la[feminine]= English article: the
la dinde means the turkey in French.
It's la raison, just like la maison, la saison, la terminaison, la conjugaison, etc. I don't know of any masculine nouns that end in -aison. (But that doesn't mean there aren't any.)
The cast of La raison du coeur - 1922 includes: Max Intard Marguerite Seymon Madame Stavelly
The cast of Caza et la raison du plus fort - 1914 includes: Lucien Cazalis as Caza