340 FOOT-NOTES TO EVOLUTION. 
science” or a new “theosophy.” ‘The “measure of a 
man” is the basis of human knowledge, and whatever 
can not be brought to this measure is 
no part of knowledge. In converse 
fashion Balfour speaks of the unknown 
in terms of the known, of the infinite in terms of hu- 
man experience. This gives to his positive “founda- 
tions of belief” an appearance of reality as fallacious as 
the unreality he assigns to the foundations of science. 
This appearance of reality is the base of Haeckel’s 
sneer at the current conception of the Divine Being as a 
“gaseous vertebrate.” 
It is perfectly easy for science to distinguish be- 
tween subjective and objective nerve conditions. It 
can separate those produced by subjec- 
tive nervous derangements, or by con- 
ditions already passed, from those which are contempo- 
raneous impressions of external things. It is perfectly 
easy for common sense to do the same. To be able to 
do so is the essence of sanity. The test of sanity is its 
liveableness, for insanity is death. The “ borderland of 
spirit,” of which we hear so much of late—the land 
where subjective and objective creations jostle each 
other at will—is the borderland of death. The con- 
tinued existence of animals and men is based on the 
adequacy of their sensations and the veracity of their 
actions. The existence of any creature is in general 
proof of the sanity of its ancestry, or at least of the 
sanity of those who controlled the actions of its an- 
cestors. 
This veracity is gauged by the degree of coincidence 
of subjective impressions and objective truth. He who 
makes a fool’s paradise or a fool’s hell of the world 
about him is not allowed to live in it. This fact in all 
its bearings must stand as a proof that the universe is 
The measure of 
aman. 
Nature of sanity. 
