"My mother, whom I loved very much, had a trouble with me. I had very good school certificates. But I tormented her with horribly stinky collections. It was not enough for me at home to have a dog, a cat, a canary, a fish, and even a white mouse. A mouse loved to walk around the apartment, although it lived in a cage. I added the protozoa to this menagerie. Traditional definitions regarded these small organisms – such as, for example, amoebae, flagellates, sponges, algae – as single-celled. What was in these asexually reproducing animals or plants that could intrigue the little boy so much that he would permanently bring this muck home?! After all, neither the request nor the threat of this exceptionally tolerant woman, who carried out her home diligently on a daily basis, did help. A trip to the ponds, or actually to the morass at Bonarka district, were exciting for the little boy. And even more, he enjoyed the moments when he could watch what was happening in aquariums, jars or cages for hours."

“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.”

“As for the number of people reluctant to me, I guess I fall in the national average. Maybe it's about talking openly what I think? For example, in 1980 an interview with several professors – including myself – was ran by the newspaper Dziennik Polski, very much against the then authorities. We've all been in favor of far-reaching changes, but each of us saw these changes differently. I am a nonbeliever. And there comes the „Solidarity” with holy masses and sprinkling corpses with holy water. I thought that policy of the University, beneficial to the „Solidarity”, was not always beneficial for the University itself. From time to time, friendly people try to affront me, even though I did not belong neither to the youth communist organization neither to the party, neither had I contacts with the communist Security Service. And generally I didn't have herd instincts.”

“I argued with Professor Julian Aleksandrowicz, because he used some therapeutic activities that I did not like, such as the debatable use of suppressive drugs. Once, I criticized him for that in public. I was already appointed a professor, when I had a nice conversation with Professor Aleksandrowicz. I started – „Sir, as a scientist...”. He interrupted me – „There are three categories of people involved in science. Scientists, they are the ones who take the test tubes, they pour something into them. There are scholars, like you. And finally, sir, there are thinkers.” Someone later pointed out that I did not answer him – „You are a thinker, sir.” Aleksandrowicz had something of a thinker in himself.”

“My professional work connects with intellectual play, with great passion. But I like to read, I'm interested in philosophy, religion and history. And I love dogs! Now I have two friends that take me out for a walk every day.”

“In my childhood, I had natural interests. I got a microscope from someone, I made a telescope myself – a very poor quality, but I could see the moon. First, I wanted to become an astronomer. I read books about astronomy by James Jeans. I even read Arthur S. Eddington, which I did not quite understand. On the other hand, Jan Dembowski's book Natural History of One Protozoan made a huge impression on me. I decided that I would go towards biology, that I would become a physician.”

“People spend unnecessarily high amounts of money on drugs or supplements that support immunity , meanwhile they do more harm to themselves by their way of life, for example by inadequate diet.”