designate by the terms _attraction, repulsion, sympathy, antipathy,
affinities, relations_; that moralists describe under the names of
_love, hatred, friendship, aversion_. Man, like all the beings in
nature, experiences the impulse of attraction and repulsion; the motion
excited in him differing from that of other beings, only, because it is
more concealed, and frequently so hidden, that neither the causes which
excite it, nor their mode of action are known. This system of attraction
and repulsion is very ancient, although it required a NEWTON to develop
it. That love, to which the ancients attributed the unfolding, or
disentanglement of chaos, appears to have been nothing more than a
personification of the principle of attraction. All their allegories and
fables upon chaos, evidently indicate nothing more than the accord or
union that exists between analogous and homogeneous substances; from
whence resulted the existence of the universe: whilst discord or
repulsion, which they called SOIS, was the cause of dissolution,
confusion, and disorder; there can scarcely remain a doubt, but this was
the origin of the doctrines of the TWO PRINCIPLES. According to DIOGENES
LAERTIUS, the philosopher, EMPEDOCLES, asserted, that "_there is a kind
of affection by which the elements unite themselves; and a sort of
discord, by which they separate or remove themselves._"

However it may be, it is sufficient for us to know that by an invariable
law, certain bodies are disposed to unite with more or less facility;
whilst others cannot combine or unite themselves: water combines itself
readily with salt, but will not blend with oil. Some combinations are
very strong, cohering with great force, as metals; others are extremely
feeble, their cohesion slight and easily decomposed, as in fugitive
colours. Some bodies, incapable of uniting by themselves, become
susceptible of union by the agency of other bodies, which serve for
common bonds or MEDIUMS. Thus, oil and water, naturally heterogeneous,