the unity of knowledge, the unity of God and law.
The difference between the will and the affections and between the
reason and the passions should also be recognized by it.

Its sphere is supposed to be narrowed to the individual soul; but it
cannot be thus separated in fact. It goes back to the beginnings of
things, to the first growth of language and philosophy, and to the whole
science of man. There can be no truth or completeness in any study of
the mind which is confined to the individual. The nature of language,
though not the whole, is perhaps at present the most important element
in our knowledge of it. It is not impossible that some numerical laws
may be found to have a place in the relations of mind and matter, as in
the rest of nature. The old Pythagorean fancy that the soul 'is or has
in it harmony' may in some degree be realized. But the indications
of such numerical harmonies are faint; either the secret of them lies
deeper than we can discover, or nature may have rebelled against the use
of them in the composition of men and animals. It is with qualitative
rather than with quantitative differences that we are concerned
in Psychology. The facts relating to the mind which we obtain from
Physiology are negative rather than positive. They show us, not the
processes of mental action, but the conditions of which when deprived
the mind ceases to act. It would seem as if the time had not yet arrived
when we can hope to add anything of much importance to our knowledge
of the mind from the investigations of the microscope. The elements of
Psychology can still only be learnt from reflections on ourselves, which
interpret and are also interpreted by our experience of others. The
history of language, of philosophy, and religion, the great thoughts or
inventions or discoveries which move mankind, furnish the larger moulds
or outlines in which the human mind has been cast. From these the
individual derives so much as he is able to comprehend or has the
opportunity of learning.

THEAETETUS

PERSONS OF THE DIALOGUE: Socrates, Theodorus, Theaetetus.

Euclid and Terpsion meet in front of Euclid's house in Megara; they
enter the house, and the dialogue is read to them by a servant.

EUCLID: Have you only just arrived from the country, Terpsion?

TERPSION: No, I came some time ago: and I have been in the Agora looking
for you, and wondering that I could not find you.

EUCLID: But I was not in the city.

T