matter, the purpose of our being in existence, the highest object that
human beings can set before themselves, is not the pursuit of any such
chimera as the annihilation of the unknown; but it is simply the
unwearied endeavour to remove its boundaries a little further from our
little sphere of action.

I wonder if any historian would for a moment admit the objection, that
it is preposterous to trouble ourselves about the history of the Roman
Empire, because we do not know anything positive about the origin and
first building of the city of Rome! Would it be a fair objection to
urge, respecting the sublime discoveries of a Newton, or a Kepler, those
great philosophers, whose discoveries have been of the profoundest
benefit and service to all men,--to say to them--"After all that you
have told us as to how the planets revolve, and how they are maintained
in their orbits, you cannot tell us what is the cause of the origin of
the sun, moon, and stars. So what is the use of what you have done?"
Yet these objections would not be one whit more preposterous than the
objections which have been made to the 'Origin of Species.' Mr. Darwin,
then, had a perfect right to limit his inquiry as he pleased, and the
only question for us--the inquiry being so limited--is to ascertain
whether the method of his inquiry is sound or unsound; whether he has
obeyed the canons which must guide and govern all investigation, or
whether he has broken them; and it was because our inquiry this evening
is essentially limited to that question, that I spent a good deal of
time in a former lecture (which, perhaps, some of you thought might
have been better employed), in endeavouring to illustrate the method
and nature of scientific inquiry in general. We shall now have to put
in practice the principles that I then laid down.

I stated to you in substance, if not in words, that wherever there are