Famous quotes containing the words exact and/or nature:
“... the compensation for a death sentence is knowledge of the exact hour when one is to die. A great luxury, but one that is well earned.”
—Vladimir Nabokov (1899–1977)
“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)