Johann Gottlieb Fichte quotes
Idea or Vision, in its sensuous meaning, would be something that could be perceived only by the bodily eye and not by any other sense such as taste, hearing, etc.; it would be such a thing as a rainbow, or the forms which pass before us in dreams. Idea or Vision, in its supersensuous meaning, would denote, first of all, in conformity with the sphere in which the word is to be valid, something that cannot be perceived by the body at all, but only by the mind; and then, something that cannot, as many other things can, be perceived by the dim feeling of the mind, but only by the eye of the mind, by clear perception.
Johann Gottlieb Fichte