In memoriam Jean‐Claude Dousse

‘Πάντα ῥεῖ’—‘everything flows’ A saying in Ancient Greek, attributed to the philosopher Heraclitus of Ephesus, states ‘τὰ πάντα ῥεῖ καὶ οὐδὲν μένει’. It may be translated ‘everything flows, and nothing stays’. Late 2020, a few months after passing Prof. Dr. Jean-Claude Dousse, we published an editorial commemorate his scientific carrier. In this short summary,1 anticipated launch special issue ‘In Memoriam Dousse’. took us time put it together, involve give all colleagues who wanted contribute issue, especially view recent COVID-19 pandemic, are happy present here. We truly believed that was important Special Issue is seeing light. Many scientists have contributed Issue, which will readers Wiley X-Ray Spectrometry journal overview fields science imprints legacy Dousse found. would like here thank authors, reviewers, team at X-ray Spectrometry, for their time, work, venture. also express our appreciation numerous expressions support initiative, whether these were followed by contribution or not. recall with lot emotions, feedback received session Dousse’ organised during European (EXRS) 2022 Conference,2 under auspices EXSA3 its members part EXRS’ International Advisory Committee. This session, widely attended, has been opportunity elaborate on achievements various research linked high-resolution spectroscopy, while grounding them into past, looking towards future developments. The common threads works, impact Jean-Claude's journey had science, generous personality, one forged trust, led respect he colleagues, collaborators alumni. sentence repeated speakers ‘I lucky persons […]’ learnt, worked, collaborated, knew Jean-Claude. Indeed, passion dealing learning acting world using imagination curiosity providing heart-centred education collaboration pairs, shined session. mirrored Issue. Engraved trophy given him 2018 occasion attribution title emeritus professor University Fribourg, Switzerland, words: ‘X-Rays forever’. Without doubt, remembered community, works continue lay foundations many upcoming breakthroughs. Science keep advancement, impacting lives, simultaneously, flows’. But XRS stay literature, hope it, together contributors, honoured Dousse.