The notorious instance of money exemplifies this operation. The same
may be said of power and fame; although these are ends as well as
means. We should be but ill provided with happiness, were it not for
this provision of nature, whereby, things, originally indifferent, but
conducive to the satisfaction of our primitive desires, become in
themselves sources of pleasure, of even greater value than the
primitive pleasures, both in permanency and in the extent of their
occupation of our life. Virtue is originally valuable as bringing
pleasure and avoiding pain; but by association it may be felt as a good
in itself, and be desired as intensely as any other good; with this
superiority over money, power, or fame, that it makes the individual a
blessing to society, while these others may make him a curse.