I found this quote below in a SSPX pamphlet. I looked it up to find some context and can't find the full quote because the sermon is just a paraphrased summary. Is there a recording somewhere of the full sermon?

"We believed that after the Council would come a day of sunshine in the history of the Church. But instead there has come a day of clouds and storms, and of darkness.... How did this come about? We will confide to you the thought that may be, we ourselves admit in free discussion, that may be unfounded, and that is that there has been a power, an adversary power. Let us call him by his name: the devil. It is as if from some mysterious crack, no, it is not mysterious, from some crack the smoke of Satan has entered the temple of God." Pope Paul VI Sermon on June 29, 1972

https://web.archive.org/web/20231128233641/https://www.churchmilitant.com/news/article/sspx-pedophile-priest-flees-victim

 - The wife of a victim presents a letter to Fr. G. , who then turned away. He was not immediately found. ...

Yes, this is the one I was talking about.

My memory is faulty.

I thought that there was a video, and that he abruptly turned away after receiving the letter from "Claude" himself.

‘All that exists outside God was, in its whole substance, produced
out of nothing by God. (De fide.) (Vatican Council I, 1870)

‘Substance,’ we know from classic philosophy means, ‘what something is,’ all finished, and not what something is becoming or can become as evolution claims. But since the 1820 volte-face, even this supernatural dogma had to be modernised.

How does substance relate to matter and form? How does matter and form differ when comparing large and small things, composed and elemental?