no really
external world at all. Moreover, they claim that the doctrine is
neither self-evident nor susceptible of proper proof.

(c) Was Kant justified in assuming that, even if we attribute the
"form" or arrangement of the world we know to the native activity of
the mind, the necessity and universality of our knowledge is assured?
Let us grant that the proposition, whatever happens must have an
adequate cause, is a "form of thought." What guarantee have we that
the "forms of thought" must ever remain changeless? If it is an
assumption for the empiricist to declare that what has been true in the
past will be true in the future, that earlier experiences of the world
will not be contradicted by later; what is it for the Kantian to
maintain that the order which he finds in his experience will
necessarily and always be the order of all future experiences?
Transferring an assumption to the field of mind does not make it less
of an assumption.

Thus, it does not seem unreasonable to charge Kant with being a good
deal of a rationalist. He tried to confine our knowledge to the field
of experience, it is true; but he made a number of assumptions as to
the nature of experience which certainly do not shine by their own
light, and which many thoughtful persons regard as incapable of
justification.

Kant's famous successors in the German philosophy, Fichte (1762-1814),
Schelling (1775-1854), Hegel (1770-1831), and Schopenhauer (1788-1860),
all received their impulse from the "critical philosophy," and yet each
developed his doctrine in a relatively independent way.

I cannot here take the space to characterize the systems of these men;
I may merely remark that all of them contrast strongly in doctrine and
method with the British philosophers mentioned in the last section,
Locke, Berkeley, Hume, and Mill. They are _un-empirical_, if one may
use such a word; and, to one accustomed to reading the English
philosophy, they seem ever ready to spread their wings and hazard the
boldest of flights without a proper realization of the thinness of the
atmosphere in which they must support themselves.

However, no matter what may be one's opinion of the actual results
attained by these German philosophers, one must frankly admit that no
one who wishes to understand clearly the development of speculative
thought can afford to dispense with a careful reading of them. Much
even of the English philosophy of our own day must remain obscu