Famous quotes containing the words stimulus and/or material:
“Decisive inventions and discoveries always are initiated by an intellectual or moral stimulus as their actual motivating force, but, usually, the final impetus to human action is given by material impulses ... merchants stood as a driving force behind the heroes of the age of discovery; this first heroic impulse to conquer the world emanated from very mortal forces—in the beginning, there was spice.”
—Stefan Zweig (18811942)
“We have not the slightest idea that women are made of such light material that the breath of any fool or knave may blow them on the rocks of ruin.”
—Jane Grey Swisshelm (1815–1884)