 Well, I accepted to speak for two reasons, first of all, because I was moved by the idea when it first was brought up of having a conference with my name on the title, but I wanted to do so in public and I deliberately refrained from preparing anything, so this is completely extemporaneous. And I just want to thank you, everybody, the organizers, all my heart for the magnificent conference, the stimulating one, even I can feel even of my late age quite strongly stimulated by coming to such a meeting when I can find the energy to do so and having my name on the title, it can be a motivation for anyone to make the effort. And also for my friend, Herman, who helped carry me here, I lost my driver's license, so I had to rely on somebody else. But anyway, the first thought of my mind thinking over the years of activity in mathematics has been the change, both objective and subjective, by attitude to our thought of mathematics. And I suspect that some of you may, as you go along in the years, undergo some changes as well. But there's also an objective change in how mathematics has developed when I was a student to this day, because I was aware of transformations of mathematics taking place while I was a student. I mean, particularly in the field that we all seem to love above all the others in mathematics, geometry, geometry was still to some extent, or at least in my mind, related to the actual etymology, the origin of the word geometry, measurements of the earth, measuring fields to be swapped between, to find the area of a field, of an agricultural field, measuring the earth, or making a building, but the idea that physical objects were physical and geometrical objects, in that sense of one of my favorite slogans is that mathematics is a form of science fiction. You imagine a world in which a physical world, but there's a physical world which is fictional, but you build a mathematics on it. There are no such things as particles. The universe is a continuum of points, but the points that you can see. When I talked to young people at the grade school, I tell them, with the tip of your finger in drawing the air, can you draw me a vertical line, very good, very good. Now put the other hand, draw another vertical line. Are the two lines parallel? The two vertical lines parallel? Yes. Congratulations. Then you believe that the earth is flat. Well, it was built, I mean Euclidean geometry, was built on that belief, and let me go on from there. Then coming from an engineering school background, again physical, into graduate school, I work in mathematics. I first learned of what the word group meant in graduate school, and as I was starting the, I first heard the Nelm Buchbaki, and the idea of the axiomatic approach for all of mathematics, I mean geometry in my mind was still very different, different discipline from algebra or calculus or anything else. I was won over by Buchbaki, and then I thought, well, in that case, why don't we use the Buchbaki method to teach on the graduates, that was a major disaster. But it took me, I'm hard headed, so it took me several years to learn that. I got less mediocre grades as a teacher in those years, but anyway, so much it is. And nowadays, the other fact was there, coming from an engineering background, I thought, well, I have to learn how mathematics will scratch, all mathematics come from axioms, I was learning it. And so all mathematics depends on Buchbaki, it was a new profit. But nowadays, and by the way, people worked in the applied areas in statistics, probability, well, there were the lower types of mathematics, and it was kind of strange that I was hearing news, this was in the early 50s, that in the Soviet Union at the time, the mathematicians there, they were getting, the applied mathematicians were getting equally honored or academically as the others. And then even a few years later, when it came to Philadelphia, as a, to the University of Pennsylvania in the mid-60s, the one who was then head of the department, Oscar Goldman, he was railing against, he was railing, he was again a pure mathematician, trained in algebraic geometry and algebraic number theory. He was railing against the advent of computers, who said computers should be confined to a building at the opposite end of the campus, and people who worshipped it go in there. He was, himself, became a computer buffer in two years, and he was, himself, became a, started constructing his own computers, and he was a closet computer guy. Anyway, and so I had to go through a third stage of evolution, learning that there is, there is mathematics as an integrated discipline, and I would like to share all those impressions with you, and that's about all I want to say, I don't want to, at the moment I'm doing essentially what I call simulated research, and I'm just pretending I do, because it takes me forever to write down a sentence on a computer, I'm still hunting and cracking, but anyway, I really want to, I'm grateful for the occasion, to the thanking, the organizers, and all my, all, and they gave me the opportunity to, to meet again with some old friends, and review my acquaintances, and make some new acquaintances. Thank you again for your attention, that's all I want to say.