I know I should not say it, but I’ll say it nevertheless, that I appreciate very much the invitation to this conference, not only because I want to participate in the honoring of Paul Dirac, but also because of the many interesting addresses, including the last one, which I heard. And as to my own address: it is a pleasure to say a few words about the person I call “my famous brother-in-law. ” It is not in all regards easy to do this as he does not like to speak about himself — often I believe he does not like to speak. But surely not about himself, his past, his childhood, his parents. But recently he gave an address in Varenna about his scientific development, about his motives in science, and I can recommend to all of us to read that article, to read it twice.