way, but a modification in the arrangement of the particles
immediately next the object, which modification reproduced itself in
the next following, and so on right through the medium to the
perceptive body.

{80}

[156]

These images tended by extension in all directions to reach vast
dimensions at times, and to influence the minds of men in sleep and on
other occasions in strange ways. Hence men imagined gods, and
attributed those mighty phenomena of nature--earthquakes, tempests,
lightning and thunder, and dire eclipses of sun and moon, to the
vaguely visible powers which they imagined they saw. There was indeed
a soul or spirit of the universe, as there was a soul or spirit of
every individual thing that constituted it. But this was only a finer
system of atoms after all. All else is convention or dream; the only
realities are Atoms and Emptiness, Matter and Space.

[157]

Of absolute verity through the senses we know nothing; our perceptions
are only conventional interpretations of we know not what. For to
other living creatures these same sensations have other meanings than
they have to us, and even the same person is not always affected alike
by the same thing; which then is the true of two differing perceptions
we cannot say. And therefore either there is no such thing as truth,
or, at all events, we know through the senses nothing of it. The only
genuine knowledge is that which transcends appearances, and reasons out
what is, irrespective of appearances,--in other words, the only genuine
knowledge is that of the (atomic) philosopher. And his knowledge is
{81} the result of the happy mixture of his atoms whereby all is in
equal balance, neither too hot nor too cold. Such a man seeing in the
mind's eye the whole universe a tissue of whirling and interlacing
atoms, with no real mystery or terror before or after, will live a life
of cheerful fearlessness, undisturbed by terrors of a world to come or
of powers unseen. His happiness is not in feastings or in gold, but in
a mind at peace. And three human perfections he will seek to attain:
to reason rightly, to speak graciously, to do his duty.

{82}

CHAPTER IX

THE SOPHISTS

_Anarchic philosophy--Success not truth--Man the measure--All opinions
true--Reductio ad absurdum_

A certain analogy may perhaps be discerned between the progression of
philosophic thought in Greece as we have traced it, and the political
development which had