Working with Bruno Latour on a Daily Basis

'I love philosophy'. With this confession, in the twilight of his life, Bruno Latour concluded a series of interviews he gave to the French television channel ARTE. This passion was reflected in original, fundamental questions that could only be answered after a long period of fieldwork. In this article, I - who worked alongside him on a daily basis in the 1980s and 1990s - describe the significance of this philosophical quest which led Latour to cross disciplinary boundaries, free himself from institutional constraints and overcome resistance. In this way, he has not only contributed to the revival of science and technology studies, but has also brought about a powerful revival in human sciences.