I make a copy of mathematics textbook Matematicka analyza v komplexnim oboru (Mathematical analysis). The copy looks identical to the original, but its texts and diagrams are all replaced by a mantra:
Loneliness is empty, intellect is a trap. Loneliness is a trap, intellect is empty.
Samota je prázdná, intelekt je past. Samota je past, intelekt je prázdný. Having the copy finished and binded, I will smugle it into the library of University of West Bohemia in Pilsen. I will let it wait on its random discoverer. I imagine how would he feel and what would he think (a miracle? madness?...)