more passionate moods, while detesting all appearance of restraint, is
not wont to show herself utterly wayward and reckless; and though in all
cases the vital informing principle is derived from her, yet to
determine the right degree and the right moment, and to contribute the
precision of practice and experience, is the peculiar province of
scientific method. The great passions, when left to their own blind and
rash impulses without the control of reason, are in the same danger as a
ship let drive at random without ballast. Often they need the spur, but
sometimes also the curb.

3
The remark of Demosthenes with regard to human life in general,--that
the greatest of all blessings is to be fortunate, but next to that and
equal in importance is to be well advised,--for good fortune is utterly
ruined by the absence of good counsel,--may be applied to literature, if
we substitute genius for fortune, and art for counsel. Then, again (and
this is the most important point of all), a writer can only learn from
art when he is to abandon himself to the direction of his genius.[1]

[Footnote 1: Literally, “But the most important point of all is that
the actual fact that there are some parts of literature which are in
the power of natural genius alone, must be learnt from no other
source than from art.”]

These are the considerations which I submit to the unfavourable critic
of such useful studies. Perhaps they may induce him to alter his opinion
as to the vanity and idleness of our present investigations.


III