S OF SUBSTANCES
XXV. OF IDEAS OF RELATION
XXVI. OF IDEAS OF CAUSE AND EFFECT, AND OTHER RELATIONS
XXVII. OF IDEAS OF IDENTITY AND DIVERSITY
XXVIII. OF IDEAS OF OTHER RELATIONS
XXIX. OF CLEAR AND OBSCURE, DISTINCT AND CONFUSED IDEAS
XXX. OF REAL AND FANTASTICAL IDEAS
XXXI. OF ADEQUATE AND INADEQUATE IDEAS
XXXII. OF TRUE AND FALSE IDEAS
XXXIII. OF THE ASSOCIATION OF IDEAS

TO THE RIGHT HONOURABLE THOMAS, EARL OF PEMBROKE AND MONTGOMERY, BARON
HERBERT OF CARDIFF LORD ROSS, OF KENDAL, PAR, FITZHUGH, MARMION, ST.
QUINTIN, AND SHURLAND;

LORD PRESIDENT OF HIS MAJESTY'S MOST HONOURABLE PRIVY COUNCIL; AND LORD
LIEUTENANT OF THE COUNTY OF WILTS, AND OF SOUTH WALES.

MY LORD,

This Treatise, which is grown up under your lordship's eye, and has
ventured into the world by your order, does now, by a natural kind of
right, come to your lordship for that protection which you several years
since promised it. It is not that I think any name, how great soever,
set at the beginning of a book, will be able to cover the faults that
are to be found in it. Things in print must stand and fall by their own
worth, or the reader's fancy. But there being nothing more to be desired
for truth than a fair unprejudiced hearing, nobody is more likely to
procure me that than your lordship, who are allowed to have got so
intimate an acquaintance with her, in her more retired recesses. Your
lordship is known to have so far advanced your speculations in the most
abstract and general knowledge of things, beyond the ordinary reach or
common methods, that your allowance and approbation of the design of
this Treatise will at least preserve it from being condemned without
reading, and will prevail to have those parts a little weighed, which
might otherwise perhaps be thought to deserve no consideration, for
being somewhat out of the common road. The imputation of Novelty is a
terrible charge amongst those who judge of men's heads, as they do of
their perukes, by the fashion, and can allow none to be right but the
received doctrines. Truth scarce ever yet carried it by vote anywhere
at its first appearance: new opinions are always suspected, and usually
opposed, without any other reason but because they are not already
common. But truth, like gold, is not the less so for being newly brought
out of the mine. It is trial and examination must give it price, and
not any antique fashion; and though it be not yet current by the public
stamp, ye