Dennis M. Healy, Jr 1957-2009 A Wise Man once wrote: "They say Jesus will find you wherever you go. But when He'll come lookin' for you, they don't know ..." I suppose everyone here is sad, that Dennis was taken sooner rather than later. But my theme today isn't sadness: I'm not so much sad that he's gone as I am glad that he was here. Dennis had a great impact on a great many people -- not only on those of us who knew him and were enlightened by him in so many ways, but also on those who knew him only indirectly, those who knew him only through we who had the great good fortune to learn from him directly. I received multiple messages from former students and collaborators, upon news of his death, saying "I never knew him, but I learned much from him just through what you've said." And I did talk about him a lot. And I will continue to do so. I met Dennis 22 years ago, in 1987, when he took a summer from Dartmouth and visited us in California. It was life-changing, for me. I taught him how to play pool with the local toughs in a seedy barroom, and how to blend in with the hooligans in the right field bleachers; he taught me what it means to be a mathematician ... and then some. At one point, Dennis gave a seminar on harmonic analysis. (For those of you who know math, it was fft on the sphere; for those of you who don't know math ... it was math.) During his talk, he was asked a key question by a particularly acerbic audience member. Dennis responded that the result in question followed immediately from some well-known theorem, but then, to elucidate, he derived the result on the spot from first principles. He really knew what he was talking about, in a sense that left me awestruck. I vowed then that someday I would know something as well as Dennis knew what Dennis knew, and that I would try to treat people the way that Dennis treated people. Over the next 22 years, I learned from him something about what it means to be a mathematician. That was important; I tried to pass some of that along to my students and collaborators. And I learned from him something about what it means to be a good man. That was really important; I tried to pass some of that along to my own children. He was taken too soon. But he had a great and lasting impact -- on mathematics, physics, science and engineering -- and on people; many of us would be lucky, if we live to be a thousand, to have the impact that Dennis Healy had in his 52 years ... Great Man, Dumbledore! And a good man, too. Daniel, William: Your father was a good man. He mattered. He mattered to a lot of people. He mattered to me. I'm glad that I knew him. I'm glad that he was here. Carey E. Priebe Hyattsville, Maryland 09/11/09