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:
“The best way to teach a child restraint and generosity is to be a model of those qualities yourself. If your child sees that you want a particular item but refrain from buying it, either because it isn’t practical or because you can’t afford it, he will begin to understand restraint. Likewise, if you donate books or clothing to charity, take him with you to distribute the items to teach him about generosity.”
—Lawrence Balter (20th century)
“In a virtuous action, I properly am; in a virtuous act, I add to the world; I plant into deserts conquered from Chaos and Nothing, and see the darkness receding on the limits of the horizon.”
—Ralph Waldo Emerson (1803–1882)
“Continual success in obtaining those things which a man from time to time desireth, that is to say, continual prospering, is that men call FELICITY; I mean Felicity of this life. For there is no such thing as perpetual Tranquillity of mind, while we live here; because Life it self is but Motion, and can never be without Desire, nor without Faeroe, no more than without Sense.”
—Thomas Hobbes (1579–1688)
“The intellectual knowledge of eternal things pertains to wisdom; the rational knowledge of temporal things, to science.”
—St. Augustine (354–430)