Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd. Bertrand Russell
The measure of greatness in a scientific idea is the extent to which it stimulates thought and opens up new lines of research. Paul Dirac
Every innovation scraps its immediate predecessor and retrieves still older figures – it causes floods of antiques or nostalgic art forms and stimulates the search for museum pieces. Marshall McLuhan
Engineering stimulates the mind. Kids get bored easily. They have got to get out and get their hands dirty: make things, dismantle things, fix things. When the schools can offer that, you'll have an engineer for life. Bruce Dickinson
One is not quite certain that creativeness in the arts, literature, and science functions best in an environment of absolute freedom. Chances are that a relatively mild tyranny stimulates creativeness. Eric Hoffer
Nothing stimulates the appetite like little on the plate. Swedish Proverb