immediately, from these circumstances, detect the falsehood, and prove
him a liar, with the same certainty as if he had stuffed his narration
with stories of centaurs and dragons, miracles and prodigies. And if we
would explode any forgery in history, we cannot make use of a more
convincing argument, than to prove, that the actions ascribed to any
person are directly contrary to the course of nature, and that no human
motives, in such circumstances, could ever induce him to such a conduct.
The veracity of Quintus Curtius is as much to be suspected, when he
describes the supernatural courage of Alexander, by which he was hurried
on singly to attack multitudes, as when he describes his supernatural
force and activity, by which he was able to resist them. So readily and
universally do we acknowledge a uniformity in human motives and actions
as well as in the operations of body.

Hence likewise the benefit of that experience, acquired by long life and
a variety of business and company, in order to instruct us in the
principles of human nature, and regulate our future conduct, as well as
speculation. By means of this guide, we mount up to the knowledge of
men's inclinations and motives, from their actions, expressions, and
even gestures; and again descend to the interpretation of their actions
from our knowledge of their motives and inclinations. The general
observations treasured up by a course of experience, give us the clue of
human nature, and teach us to unravel all its intricacies. Pretexts and
appearances no longer deceive us. Public declarations pass for the
specious colouring of a cause. And though virtue and honour be allowed
their proper weight and authority, that perfect disinterestedness, so
often pretended to, is never expected in multitudes and parties; seldom
in their leaders; and scarcely even in individuals of any rank or
station. But were there no uniformity in human actions, and were every
experiment which we could form of this kind irregular and anomalous, it