Illustration Quotes - page 5
[T]he rise of Germany into the front rank of the commercial Powers of the world was the most remarkable illustration that was to be found of the practical value of education, organization, and concentration. ... Any man who read the accounts of what was done and provided in France, Germany, Belgium, Austria, and, above all, the United States of America, and contrasted the magnificent educational apparatus in which the humblest boy in those countries might aspire to be a participant with our own scanty, slovenly, unscientific, and ill-organized system, or want of system, would no longer be at a loss to understand why England was handicapped in the race for commercial supremacy.
H. H. Asquith
The Cotton Mill invented in England, within the last twenty years, is a signal illustration of the general proposition, which has been just advanced. In consequence of it, all the different processes for spinning Cotton are performed by means of Machines, which are put in motion by water, and attended chiefly by women and Children; and by a smaller number of persons, in the whole, than are requisite in the ordinary mode of spinning. And it is an advantage of great moment that the operations of this mill continue with convenience, during the night, as well as through the day. The prodigious affect of such a Machine is easily conceived. To this invention is to be attributed essentially the immense progress, which has been so suddenly made in Great Britain in the various fabrics of Cotton.
Alexander Hamilton
A law explains a set of observations; a theory explains a set of laws. The quintessential illustration of this jump in level is the way in which Newton's theory of mechanics explained Kepler's law of planetary motion. Basically, a law applies to observed phenomena in one domain (e.g., planetary bodies and their movements), while a theory is intended to unify phenomena in many domains. Thus, Newton's theory of mechanics explained not only Kepler's laws, but also Galileo's findings about the motion of balls rolling down an inclined plane, as well as the pattern of oceanic tides. Unlike laws, theories often postulate unobservable objects as part of their explanatory mechanism. So, for instance, Freud's theory of mind relies upon the unobservable ego, superego, and id, and in modern physics we have theories of elementary particles that postulate various types of quarks, all of which have yet to be observed.
Johannes Kepler