„In lectures, it is important that you lecture plain. We are interested in the smartest students, and we really should take care of those who have most difficulties with understanding certain concepts. I try to balance it. You know what? In lecturing, Jerzy Vetulani really helped me – listening to his lectures, I learned how to teach correctly, so that the students did not fall asleep after fifteen minutes.“
— Jerzy Vetulani Polish scientist 1936 - 2017
Marek Sanak, geneticist and molecular biologist, friend and disciple of Vetulani. Kobos, Andrzej (2012). Po drogach uczonych. 5. Polska Akademia Umiejętności. p. 334. ISBN 978-83-7676-127-5.