• The rigour of science requires that we distinguish well the undraped figure of Nature itself from the gay-coloured vesture with which we clothe her at our pleasure.

    Heinrich Hertz: The rigour of science requires that we distinguish well the undraped figure of Nature itself from the gay-coloured vesture with which we clothe her at our pleasure.
    "Nature", Vol. 51, Nature Publishing Group, letter by Ludwig Boltzmann, 1895.