THREE:Any truth in mechanics, even the action of the "mechanical powers" before alluded to, is received with an air of mystery, unless the nature of power is first understood. Practical demonstration a hundred times repeated does not create a conviction of truth in mechanical propositions, unless the principles of operation are understood.The qualities which enabled Epicurus to compete successfully with much greater thinkers than himself as the founder of a lasting sect, were practical rather than theoretical. Others before him had taught that happiness was the end of life; none, like him, had cultivated the art of happiness, and pointed out the fittest methods for attaining it. The idea of such an art was a real and important addition to the resources of civilisation. No mistake is greater than to suppose that pleasure is lost by being made an object of pursuit. To single out the most agreeable course among many alternatives, and, when once found, steadily to pursue it, is an aptitude like any other, and is capable of being brought to a high degree of perfection by assiduous attention and self-discipline.211 No doubt the capacity for enjoyment117 is impaired by excessive self-consciousness, but the same is true of every other accomplishment during the earlier stages of its acquisition. It is only the beginner who is troubled by taking too much thought about his own proficiency; when practice has become a second nature, the professor of hedonism reaps his harvest of delight without wasting a thought on his own efforts, or allowing the phantom of pleasure in the abstract to allure him away from its particular and present realisation. And, granting that happiness as such can be made an object of cultivation, Epicurus was perfectly right in teaching that the removal of pain is its most essential condition, faulty as was (from a speculative point of view) his confusion of the condition with the thing itself. If the professed pleasure-seekers of modern society often fail in the business of their lives, it is from neglecting this salutary principle, especially where it takes the form of attention to the requirements of health. In assigning a high importance to friendship, he was equally well inspired. Congenial society is not only the most satisfying of enjoyments in itself, but also that which can be most easily combined with every other enjoyment. It is also true, although a truth felt rather than perceived by our philosopher, that speculative agreement, especially when speculation takes the form of dissent from received opinions, greatly increases the affection of friends for one another. And as theology is the subject on which unforced agreement seems most difficult, to eliminate its influence altogether was a valuable though purely negative contribution to unanimity of thought and feeling in the hedonistic sect.
