Famous quotes containing the words principal, null and/or directions:
“There are three principal means of acquiring knowledge available to us: observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination. Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.”
—Denis Diderot (1713–1784)
“A strong person makes the law and custom null before his own will.”
—Ralph Waldo Emerson (1803–1882)
“I do not like football, which I think of as a game in which two tractors approach each other from opposite directions and collide. Besides, I have contempt for a game in which players have to wear so much equipment. Men play basketball in their underwear, which seems just right to me.”
—Anna Quindlen (b. 1952)