Impregnable Quotes (2 quotes)
This new integral of Lebesgue is proving itself a wonderful tool. I might compare it with a modern Krupp gun, so easily does it penetrate barriers which were impregnable.
In 'Current Tendencies of Mathematical Research', Bulletin of the American Mathematical Society (Oct 1916), 23, 7. Previously given as an address read at the Quarter Centennial of the University of Chicago, before a conference of the mathematical, physical and astronomical departments.
To any doctrine of individual immortality science opposes an unbroken and impregnable barrier.
In 'Is the Human Animal Immortal', Religion as a Credible Doctrine (1903), 85.