[4] This was discovered by one of Łyszczyński's debtors, Jan Kazimierz Brzoska, who was the nuncio of Brest in Poland or a Stolnik of Bracławice or Łowczy of Brześć.

Brzoska, reluctant to return a great sum of money lent him by Łyszczyński, accused the latter of being an atheist and gave the aforementioned work as evidence to Witwicki, bishop of Poznań.

Brzoska also stole and delivered to the court a handwritten copy of De non-existentia Dei, which was the first Polish philosophical treatise presenting reality from an atheistic perspective, and which Łyszczyński had been working on since 1674.

Bishop Załuski gave the following account of the execution: After recantation the culprit was conducted to the scaffold, where the executioner tore with a burning iron the tongue and the mouth, with which he had been cruel against God; after which his hands, the instruments of the abominable production, were burnt at a slow fire, the sacrilegious paper was thrown into the flames; finally himself, that monster of his century, this deicide was thrown into the expiatory flames; expiatory if such a crime may be atoned for.

There is an actual transcript of the proceedings at the Kórnik library, including a speech by the Grand Duchy of Lithuania Instigator Regni Szymon Kurowicz Zabistowski, citing fragments of De non-existentia Dei.

"[10] According to Maciej Pomian-Srzednicki (1982), "It appears that Łyszczyński was sentenced to death for writing a treatise entitled 'De non-existentia Dei' ... and all that remains are a few notes which were made during the trial.

Łyszczyński's importance as a martyr of the atheist cause has led to his romanticization by Nowicki and to his rescue from a murky cell in the obscure by-ways of history.

103–104) In March 2014, his persona and ideas were the key theme in a public performance during the 2014 Procession of Atheists in Poland,[11][12] during which his execution was reenacted.