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 obscure to
those who have not looked into their pages. Thus, the thought of Kant
and Hegel molded the thought of Thomas Hill Green (1836-1882) and of
the brothers Caird; and their influence has made itself widely felt
both in England and in America. One cannot criticise intelligently
books written from their standpoint, unless one knows how the authors
came by their doctrine and out of what it has been developed.

63. CRITICAL EMPIRICISM.--We have seen that the trouble with the
rationalists seemed to be that they made an appeal to "eternal truths,"
which those who followed them could not admit to be eternal truths at
all. They proceeded on a basis of assumptions the validity of which