than any certain knowledge. And, finally, although such be the ground of
our opinions, I remarked that a plurality of suffrages is no guarantee of
truth where it is at all of difficult discovery, as in such cases it is
much more likely that it will be found by one than by many. I could,
however, select from the crowd no one whose opinions seemed worthy of
preference, and thus I found myself constrained, as it were, to use my own
reason in the conduct of my life.

But like one walking alone and in the dark, I resolved to proceed so
slowly and with such circumspection, that if I did not advance far, I
would at least guard against falling. I did not even choose to dismiss
summarily any of the opinions that had crept into my belief without having
been introduced by reason, but first of all took sufficient time carefully
to satisfy myself of the general nature of the task I was setting myself,
and ascertain the true method by which to arrive at the knowledge of
whatever lay within the compass of my powers.

Among the branches of philosophy, I had, at an earlier period, given some
attention to logic, and among those of the mathematics to geometrical
analysis and algebra, -- three arts or sciences which ought, as I
conceived, to contribute something to my design. But, on examination, I
found that, as for logic, its syllogisms and the majority of its other
precepts are of avail- rather in the communication of what we already
know, or even as the art of Lully, in speaking without judgment of things
of which we are ignorant, than in the investigation of the unknown; and
although this science contains indeed a number of correct and very
excellent precepts, there are, nevertheless, so many others, and these
either injurious or superfluous, mingled with the former, that it is
almost quite as difficult to effect a severance of the true from the false
as it is to extract a Diana or a Minerva from a rough block of marble.