How do you find out where the Patriarch gets information for his speeches?translated

Reader question:
Today there was a program on the SPAS channel where Patriarch Kirill said the following: “The then godless ruler, seeing this, proclaimed: “The current generation of Soviet people will live under communism, which means the Church will be finished.” Can I find out the original source where this was said? In the CPSU Program of 1961, these words are heard only in the following wording: “The Party solemnly proclaims: the current generation of Soviet people will live under communism!”
Alina
Priest's answer:
Archpriest Andrey EFANOV
Hello!
Dear Alina, I do not know the source of information that His Holiness Patriarch Kirill used, but you must agree that the Patriarch’s capabilities are greater than ours. And information comes to him, among other things, from sources that are inaccessible to us.
However, in order to say such words on television, you do not need access to any special, classified sources. It is enough to look at the trend of atheistic propaganda at that time to draw conclusions about the desire to destroy any religiosity in the USSR.
As for the program of the XXII Congress of the CPSU, it contains the following words:
“It is necessary to systematically conduct a broad...



