Music is dual in its nature; it is material as well as spiritual. Its material side we apprehend through the sense of hearing, and comprehend through the intellect; its spiritual side reaches us through the fancy (or imagination, so it be music of the highest class), and the emotional part of us.

If the scope and capacity of the art, and the evolutionary processes which its history discloses (a record of which is preserved in its nomenclature), are to be understood, it is essential that this duality be kept in view.

There is something so potent and elemental in the appeal which music makes that it is possible to derive pleasure from even an unwilling hearing or a hearing unaccompanied by effort at analysis; but real appreciation of its beauty, which means recognition of the qualities which put it in the realm of art, is conditioned upon intelligent hearing.

The higher the intelligence, the keener will be the enjoyment, if the former be directed to the spiritual side as well as the material.

So far as music is merely agreeably co-ordinated sounds, it may be reduced to mathematics and its practice to handicraft. But recognition of design is a condition precedent to the awakening of the fancy or the imagination, and to achieve such recognition there must be intelligent hearing in the first instance. 

From: H. Krehbiel’s, How to Listen to Music; excerpts, edited by Ellopos Blog