Dir Clear Mark

Famous quotes containing the words clear and/or mark:

“It is clear that everybody interested in science must be interested in world 3 objects. A physical scientist, to start with, may be interested mainly in world 1 objects—say crystals and X-rays. But very soon he must realize how much depends on our interpretation of the facts, that is, on our theories, and so on world 3 objects. Similarly, a historian of science, or a philosopher interested in science must be largely a student of world 3 objects.”
—Karl Popper (1902–1994)

“There mark what ills the scholar’s life assail,
Toil, envy, want, the patron, and the gaol.”
—Samuel Johnson (1709–1784)