David Hilbert Natur Und Mathematisches Erkennen

At the time of David Hilbert's death in 1943, his leading disciple, Her- mann Weyl, wrote that " . . . the era of mathematics upon which he impressed the seal of his spirit and which is now sinking below the horizon achieved a more perfect balance than prevailed before and after, between the mastering of concrete problems and the formation of general abstract concepts.