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)
“True love ennobles and dignifies the material labors of life; and homely services rendered for love’s sake have in them a poetry that is immortal.”
—Harriet Beecher Stowe (1811–1896)