Why is Ça used to begin the specific statement relating to the play?

Question

Ça a toujours été ma pièce de théâtre ....etc. Bit surprised to see 'Ca' rather than 'Il a toujours etc .....' (as I answered), reasoning that this is a statement relating to a specific thing, ie, the play 'Waiting for Godot', whereas 'Ca' is used for general statements?

Accepted Answer

"Ça" is a demonstrative pronoun and means "that", so it's very specific.

Answer

Hi Barrie,"Waiting for Godot". "It has always been my favourite play by Samuel Beckett" I think this is a case of being "idiomatic" because the "Waiting for Godot" immediately preceded. Strictly speaking, you are correct but this is how I see it.Jim

Answer

Bonjour Barrie,
'Ça' (= cela) refers to an idea already mentioned - see link here (under 'Notions'): Ceci, Cela = That, this.
Other useful links: when to use ça/il  -  J'adore ça / Je l'adore
I hope this is helpful.
Bonne journée !