"... conferences with open attendance are very important for the stimulation of young people or other people who are new in the field." Victor Weisskopf, born 19 September 1908.
"Above all, we must be accurate, and it is an obligation which we intend to fulfil scrupulously." Léon Foucault, born 18 September 1819.
"The Earth is the cradle of mind, but one cannot live in a cradle forever." Konstantin Tsiolkovsky, born 17 September 1857.
"Thus the questions (and the quest) go on." George Sudarshan, born 16 September 1931.
"While many questions about quantum mechanics are still not fully resolved, there is no point in introducing needless mystification where in fact no problem exists. Yet a great deal of recent writing about quantum mechanics has done just that." Murray Gell-Mann, born 15 September 1929.
"Our imagination is struck only by what is great; but the lover of natural philosophy should reflect equally on little things." Alexander von Humboldt, born 14 September 1769.
"Science knows no boundaries, and efforts to create barriers – whether to keep new ideas within or to prevent new ones from entering from the outside – have universally proved harmful to progress." Sidney Drell, born 13 September 1926.