Sentence:  The two are fused together in a single act and single product, precisely as an idea <WSD>incarnated</WSD> in an image, i.e., the expression of an embodied-spirit, grasped all at once as a meaning shining through a manifold of images and held as one in the unity of human consciousness which is simultaneously intellectual and sensible. 
Meaning of the word marked with <WSD> tags:  To put into or represent in a concrete form, as an idea.