Logicians may reason about abstractions. But the great mass of men must have images. The strong tendency of the multitude in all ages and nations to idolatry can be explained on no other principle.
The question of "unreality"is a very important one. Misled by grammar, the great majority of those logicians who have dealt with this question have dealt with it on mistaken lines. They have regarded grammatical form as a surer guide in analysis than, in fact, it is. And they have not known what differences in grammatical form are important.
Mathematicians care no more for logic than logicians for mathematics.
The pedant and the priest have always been the most expert of logicians -- and the most diligent disseminators of nonsense and worse.