WANT OF PHILOSOPHICAL CULTURE, 349 
And again :— 
Nature has neither kernel nor shell, 
It is she that is All and All at once.* 
What is even more detrimental to the general understand- 
ing of nature as a whole than this one-sided tendency, is 
the want of a philosophical culture, and this applies to most 
of the naturalists of the present day. The various errors of 
the earlier speculative nature-philosophy made during the 
first thirty years of our century, have brought the whole of 
philosophy into such bad repute with the exact empirical 
naturalists, that they live in the strange delusion that it 
is possible to erect the edifice of natural science out of mere 
facts, without their philosophic connection ; in short, out of 
mere knowledge, without the understanding of it. But as 
a purely speculative and absolutely philosophical system, 
which does not concern itself with the indispensable founda- 
tion of empirical facts, becomes a castle in the air, which 
the first real experiment throws to the winds; so, on the 
other hand, a purely empirical system, constructed of 
nothing but facts, remains a disorderly heap of stones, 
which will never deserve the name of an edifice. Bare 
facts established by experience are nothing but rude stones, 
and without their thoughtful valuation, without their philo- 
sophie connection, no science can be established. As I 
have already tried to impress upon my reader, the strong 
edifice of true monistic science, or what is the same thing, 
the Science of Nature, exists only by the closest interaction, 
and the reciprocal penetration of philosophy and empirical 
knowledge. 
* Natur hat weder Kern noch Schale, 
Alles ist sie mit einem Male. 
