Famous quotes containing the words requires and/or verification:
“God doesn’t require us to succeed; he only requires that you try.”
—Mother Teresa (b. 1910)
“A fact is a proposition of which the verification by an appeal to the primary sources of our knowledge or to experience is direct and simple. A theory, on the other hand, if true, has all the characteristics of a fact except that its verification is possible only by indirect, remote, and difficult means.”
—Chauncey Wright (1830–1875)