Famous quotes containing the words primary and/or planet:
“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)
“I have always believed that opera is a planet where the muses work together, join hands and celebrate all the arts.”
—Franco Zeffirelli (b. 1922)