Is not that a joy, a prize, which wealth cannot give, nor poverty
take away? What it may lead to, he knows not. Of what use it may
become, he knows not. But this he knows, that somewhere it must
lead; of some use it will be. For it is a truth; and having found a
truth, he has exorcised one more of the ghosts which haunt humanity.
He has left one object less for man to fear; one object more for man
to use. Yes, the scientific man may have this comfort, that
whatever he has done, he has done good; that he is following a
mistress who has never yet conferred aught but benefits on the human
race.

What physical science may do hereafter I know not; but as yet she
has done this:

She has enormously increased the wealth of the human race; and has
therefore given employment, food, existence, to millions who,
without science, would either have starved or have never been born.
She has shown that the dictum of the early political economists,
that population has a tendency to increase faster than the means of
subsistence, is no law of humanity, but merely a tendency of the
barbaric and ignorant man, which can be counteracted by increasing
manifold by scientific means his powers of producing food. She has
taught men, during the last few years, to foresee and elude the most
destructive storms; and there is no reason for doubting, and many
reasons for hoping, that she will gradually teach men to elude other
terrific forces of nature, too powerful and too seemingly capricious
for them to conquer. She has discovered innumerable remedies and
alleviations for pains and disease. She has thrown such light on
the causes of epidemics, that we are able to say now that the