“Enemies are so stimulating.”

“A noble purpose inspires sacrifice, stimulates innovation, and encourages perseverance. In so doing, it transforms great talent into exceptional accomplishment.”

“As the prerogative of Natural Science is to cultivate a taste for observation, so that of Mathematics is, almost from the starting point, to stimulate the faculty of invention.”

“If everyone were not so indolent they would realise that beauty is beauty even when it is irritating and stimulating not only when it is accepted and classic.”

“The enemy of my enemy is my friend, so that makes Google my best friend.”

“To stimulate the brain or not to stimulate? Whether 'tis nobler to take the exam after the sleepless night, with the brain darkened, but not stimulated, or in the chemicals to seek help? To waste a year or to pay health for quick success? I will not advise you.”

“He thinks he's happy but it's just a nerve cell in his brain that's getting too much stimulation or too little stimulation.”

“It is so easy to be an enemy of the United States, but so difficult to be a friend.”

“Live, and so confound our enemies.”

“Never underestimate the stimulation of eccentricity.”