George Santayana,
Egotism in German Philosophy — Chapter III. Transcendentalism
(1916)
“ All transcendentalism takes the point of view of what it calls knowledge; whenever it mentions anything—matter, God, oneself—it means not that thing but the idea of it. By knowledge it understands the image or belief, the fact of cognition. Whatever is thought of exists, or can exist, in this philosophy, only for thought; yet this thought is called not illusion but knowledge, because knowledge is what the thought feels that it is. Evidently on this principle none of Leibniz’s spirits could know any other, nor could any phase of the same spirit know any other phase. ”
