Because of the stupendous energy demands of flight, birds not only have the superior air sac system for breathing, but their , the cell’s energy-generation centers, are far more efficient than mammalian mitochondria. Parrots in captivity can , scientists have noted an , and scientists may discover that wild albatrosses live to be 100 or more, when their tagging programs get that old. The may explain bird longevity, as the efficient mitochondria of birds . The theory is controversial and will be for many years, but I think that an engine analogy can help. A bird is a piece of high-performance biological technology, and when operating at peak output it puts all land-bound animals to shame. But a bird’s metabolism is usually in its slack state, only maximized during flight. Simply put, a bird has a great energy capacity that is rarely used to its fullest. It is like a high-performance engine that rarely runs near its . Such engines will last far longer than those regularly running near redline. High-performance technology that usually “loafs” in its slack state and is rarely taxed is expensive and long-lasting. The increased investment in superior technology allows for high performance and long life. High-quality technology is more economical in the long run, if the initial investment can be afforded.
Another important fact is, that the township of New England is so constituted as to excite the warmest of human affections, without arousing strongly the ambitious passions of the heart of man. The officers of the county are not elective, and their authority is very limited. Even the state is only a second-rate community, whose tranquil and obscure administration offers no inducement to most men, sufficient to draw them away from the centre of their private interests into the turmoil of public affairs. The federal government confers power and honour on the men who conduct it; but these can never be very numerous. The high station of the Presidency can only be reached at an advanced period of life; and the other federal offices of a high order are generally attained, as it were accidentally, by persons who have already distinguished themselves in some other career. Their attainment cannot be the permanent aim of an ambitious life. In the township, therefore, in the centre of the ordinary relations of life, become concentrated the desire of public esteem, the thirst for the exercise of influence, and the taste for authority and popularity; and the passions which commonly embroil society, change their character when they find a vent so near the domestic hearth and the family circle.
Essay on My Aim in Life to Become a Pilot | Creative Essay
It will probably be conceded that it is desirable people should exercise their understandings, and that an intelligent following of custom, or even occasionally an intelligent deviation from custom, is better than a blind and simply mechanical adhesion to it. To a certain extent it is admitted, that our understanding should be our own: but there is not the same willingness to admit that our desires and impulses should be our own likewise: or that to possess impulses of our own, and of any strength, is anything but a peril and a snare. Yet desires and impulses are as much a part of a perfect human being, as beliefs and restraints: and strong impulses are only perilous when not properly balanced; when one set of aims and inclinations is developed into strength, while others, which ought to co-exist with them, remain weak and inactive. It is not because men’s desires are strong that they act ill; it is because their consciences are weak. There is no natural connexion between strong impulses and a weak conscience. The natural connexion is the other way. To say that one person’s desires and feelings are stronger and more various than those of another, is merely to say that he has more of the raw material of human nature, and is therefore capable, perhaps of more evil, but certainly of more good. Strong impulses are but another name for energy. Energy may be turned to bad uses; but more good may always be made of an energetic nature, than of an indolent and impassive one. Those who have most natural feeling, are always those whose cultivated feelings may be made the strongest. The same strong susceptibilities which make the personal impulses vivid and powerful, are also the source from whence are generated the most passionate love of virtue, and the sternest self-control. It is through the cultivation of these, that society both does its duty and protects its interests: not by rejecting the stuff of which heroes are made, because it knows not how to make them. A person whose desires and impulses are his own—are the expression of his own nature, as it has been developed and modified by his own culture—is said to have a character. One whose desires and impulses are not his own, has no character, no more than a steam-engine has a character. If, in addition to being his own, his impulses are strong, and are under the government of a strong will, he has an energetic character. Whoever thinks that individuality of desires and impulses should not be encouraged to unfold itself, must maintain that society has no need of strong natures—is not the better for containing many persons who have much character—and that a high general average of energy is not desirable.