One can measure the importance of a scientific work by the number of earlier publications rendered superfluous by it
David HilbertHe who seeks for methods without having a definite problem in mind seeks in the most part in vain.
David HilbertFor us there is no ignorabimus, and in my opinion none whatever in natural science. In opposition to the foolish ignorabimus our slogan shall be: "We must know - we will know!"
David Hilbert