I know Blondie, that article in 1957 was a landmark. Also, please note the difference between "celestial organisation" and "universal organisation" – the latter expression encompassing also the earthly organisation.
That quote from 1983 is also very good, thanks for pointing it out.
But even very recently, and I could swear it was on a talk delivered by a Government Body member in an annual WT meeting of this decade already, ( I may be wrong, though) it was stressed out again the role of the Organisation as "our mother", as per Galatians 4:26.
On the article I'm writing, which looks at the emotional attachment between the individual Witnesses and their "organisation" in the light of the psychological "Attachment Theory", it seems important to me this "personification" of the organisation in a motherly figure.