I studied physics at the University of Lausanne, in the eighties of last century, where I had the chance of learning quantum mechanics from Gérard Wanders and Dominique Rivier, two students of Ernst Stueckelberg, and from Jean-Jacques Loeffel, a student of Pauli. Later, I was assistant to Constantin Piron, in Geneva, for his famous course in quantum mechanics. Constantin was also a student of Stueckelberg, as well as of Josef Maria Jauch. I then went doing my doctoral thesis with Philippe-André Martin, a college friend of Piron and also a student of Jauch. In other words, I had the chance of learning quantum mechanics from people who received the highest possible level training into it, and who were truly interested and invested in understanding it, both mathematically and conceptually. When in more recent times I got in touch with Diederik Aerts, after quite a long time I had not practiced physics anymore, I believe it is only because I had such authoritative teachers, providing me with the right perspective and mental posture, that a fascinating and fruitful collaboration could develop.