Logic sometimes makes monsters. For half a century we have seen a mass of bizarre functions which appear to be forced to resemble as little as possible honest functions which serve some purpose.
Henri PoincareExperiment is the sole source of truth. It alone can teach us something new; it alone can give us certainty.
Henri PoincareThe aim of science is not things themselves, as the dogmatists in their simplicity imagine, but the relation between things.
Henri PoincareAbsolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves, has no objective existence.... The two propositions: "The earth turns round" and "it is more convenient to suppose the earth turns round" have the same meaning; there is nothing more in the one than in the other.
Henri Poincare