Practical Limits For Obtaining Knowledge
What we hold to be knowledge is often derived by a combination of reason from either traditional, authoritative, or scientific sources. Many times such knowledge is not verifiable; sometimes the process of testing is prohibitively dangerous or expensive. For instance, some physics theories about the nature of the universe, such as string-theory, require the construction of testing equipment currently beyond our technology. Since such theories are in principle subject to verification or refutation, they are scientific; since they are not proven experimentally, they are not considered certain knowledge. Rather, in such cases we have certain knowledge only of the theory, but not of what the theory describes.
"Of the three ways in which men think that they acquire knowledge of things—authority, reasoning, and experience—only the last is effective and able to bring peace to the intellect." (Roger Bacon, English alchemist, astrologer, philosopher and a major progenitor of modern science.
Read more about this topic: Descriptive Knowledge
Famous quotes containing the words practical, limits, obtaining and/or knowledge:
“One of the great triumphs of the nineteenth century was to limit the connotation of the word “immoral” in such a way that, for practical purposes, only those were immoral who drank too much or made too copious love. Those who indulged in any or all of the other deadly sins could look down in righteous indignation on the lascivious and the gluttonous.... In the name of all lechers and boozers I most solemnly protest against the invidious distinction made to our prejudice.”
—Aldous Huxley (1894–1963)
“The element running through entire nature, which we popularly call Fate, is known to us as limitation. Whatever limits us, we call Fate.”
—Ralph Waldo Emerson (1803–1882)
“And if the civilized man’s pursuits are no worthier than the savage’s, if he is employed the greater part of his life in obtaining gross necessaries and comforts merely, why should he have a better dwelling than the former?”
—Henry David Thoreau (1817–1862)
“Hence a young man is not a proper hearer of lectures on political science; for he is inexperienced in the actions that occur in life, but its discussions start from these and are about these; and, further, since he tends to follow his passions, his study will be vain and unprofitable, because the end aimed at is not knowledge but action.”
—Aristotle (384–322 B.C.)