As Being in the Domain of Logic. 
53 
shall find the summit in which all culminate. It is as much in 
the make of mind to know outright that the field of reality is 
one whole as it is to know its several territories. It is in all 
instinct after reality that the universe is one. The mountain 
top we climb by laborious ascent is not only known to the trav¬ 
eller as the result of his climbing, so that he knows it only 
when his foot presses its utmost rock. He has lived in the 
neighborhood of it from boyhood, and has seen its splendors 
from afar. Mind knows more than it finds out. That the uni¬ 
verse is one is not an inference from observation; it is an in¬ 
sight. We may not define to ourselves all the volume of this 
one so as to infer its content, as some have tried to do, for our 
eyes are dim. But Plato was right; we know the wholeness by 
insight, and so all after gettings, when we find them, fall into 
their place in the organic whole. One sufficient reason, as 
regulative principle and ground of the whole in every part, is 
the splendid indigenous revelation of mind, in the light of which 
the man of science goes to his royal study. That absolute rea¬ 
son— the nous of Plato—supreme, one, answering ultimately 
all our askings of the reasons why, puts the law upon our science 
that amid the multiplicity of sciences science must be one, even 
as there is one reasonable universe. This law, that science 
must obey that unifying reason — that all thinking must obey 
it — is the supreme content of the science of logic. Logic is 
the science of our thought of things as child of the one absolute 
reason. Only in the liberty of that law is mind satisfied. It 
gives — and only it gives — science confidence, as having the cer¬ 
tainty, in its finding, of that one Reason, splendid fountain of 
light in which there is no darkness at all, “ whose voice is the 
harmony of the world. ” 
2. The division of this universe and its distribution into fields 
as subjects of the several sciences is wholly in the domain of logic. 
One is impressed with the apparently opportunistic way in 
which the various sciences have come into existence one after 
another; how, for example, astronomy, chemistry, meteorology, 
physics, psychology, had their origin, and on what account we 
have now only just so many sciences and no more. One is apt 
to raise the question how the limit is determined and on what 
