Famous quotes containing the words single and/or observation:
“‘Tis not the many oaths that makes the truth,
But the plain single vow that is vowed true.
What is not holy, that we swear not by,
But take the Highest to witness.”
—William Shakespeare (1564–1616)
“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)