investigations that Eucken outlines a new theory of life.

But before we proceed to deal with Eucken's contribution to the problem,
it will be profitable to stay awhile to consider how it is that we can
obtain truth at all, and what are the tests that we can apply to truth
when we think we have attained it. It is the problem of the possibility
of knowledge, really, that we have to discuss in brief. Eucken himself
does not pay much direct attention to this difficult question, for, as
has been already pointed out, he refuses to be drawn from his main
problem. It is impossible, however, to appreciate Eucken without
understanding clearly the position he takes up in this matter.

What is truth? How can we know?--these are entrancing problems for the
profound thinker, and have been written upon frequently and at great
length. But we can do little more at present than give the barest
outline of the positions that have been taken up. Every search for truth
must assume a certain position in this matter; in studying Eucken's
philosophy it is of the first importance--more so perhaps than in the
case of most other philosophers--to keep in mind clearly from the outset
the position he implicitly assumes.

The simplest theory of knowledge is that of _Empiricism_, which holds
that all knowledge must be gained through experience of the outside
world, and of our mental states. We see a blue wall, we obtain through
our eyes an impression of blueness, and are able to make a statement:
"This wall is blue." This, of course, is one of the simplest assertions
that can be made, and consists merely in assigning a term--"blue"--the
meaning of which has already been agreed upon, to a colour that we
appear to see on a wall. The test of the truth of this assertion is a
simple one--it is true if it corresponds with fact. If the same