I don't like to stay long outside of Kraków. I was always happy to go back there, just like a cat. Well, that's my mental structure. - Włodzimierz Ptak

Tadzik Gumiński (later a reader in pediatry), who was just like me fascinated by astronomy, lived at Szpitalna Street, and I lived at Garncarska Street. Not far from our homes, at Podwale, there was an optical store Maruńczak and the Company (in the place where the scientific bookstore is now located). In this optical store, as little kids, we bought lenses and other parts necessary to build a telescope. This telescope, of course, was very simple. But thanks to it, we spent many nights observing the sky, deciphering star systems. It was really great fun.

Borejza, Tomasz (January 2018): Trochę bakterii nie zaszkodzi. Przegląd (4/2018): pp. 54–55.

Contrary to what is often thought, excessive hygiene, staying in an antibacterial environment, does not necessarily lead to a better health. Sometimes it causes even health deterioration. Indirect proof may be that among rural children there are fewer allergic diseases than among urban children. This is because children in the countryside have contact with a lot more bacteria. In every respect, you can see that exaggeration is unhealthy.