fe, and not know when he has done: Much lesse will he be
able to add, and substract, and performe all other operations of
Arithmetique. So that without words, there is no possibility of
reckoning of Numbers; much lesse of Magnitudes, of Swiftnesse, of Force,
and other things, the reckonings whereof are necessary to the being, or
well-being of man-kind.

When two Names are joyned together into a Consequence, or Affirmation;
as thus, A Man Is A Living Creature; or thus, If He Be A Man, He Is A
Living Creature, If the later name Living Creature, signifie all that
the former name Man signifieth, then the affirmation, or consequence is
True; otherwise False. For True and False are attributes of Speech, not
of things. And where Speech in not, there is neither Truth nor Falshood.
Errour there may be, as when wee expect that which shall not be; or
suspect what has not been: but in neither case can a man be charged with
Untruth.

Seeing then that Truth consisteth in the right ordering of names in our
affirmations, a man that seeketh precise Truth, had need to remember
what every name he uses stands for; and to place it accordingly; or els
he will find himselfe entangled in words, as a bird in lime-twiggs; the
more he struggles, the more belimed. And therefore in Geometry, (which
is the onely Science that it hath pleased God hitherto to bestow on
mankind,) men begin at settling the significations of their words; which
settling of significations, they call Definitions; and place them in the
beginning of their reckoning.

By this it appears how necessary it is for any man that aspires to true
Knowledge, to examine the Definitions of former Authors; and either
to correct them, where they are negligently set down; or to make them
himselfe. For the errours of Definitions multiply themselves, according
as the reckoning proceeds; and lead men into absurdities, which at last
they see, but cannot avoyd, without reckoning anew from the beginning;
in which lyes the foundation of their errours. From whence it happens,
that they which trust to books, do as they that cast up many little
summs into a greater, without considering whether those little summes
were rightly cast up or not; and at last finding the errour visible,
and not mistrusting their first grounds, know not which way to cleere
themselves; but spend time in fluttering over their bookes; as birds
that entring by the chimney, and finding themselves inclosed in a
chamber, flitter