The object of science is knowledge; the objects of art are works. In art, truth is the means to an end; in science, it is the only end. Hence the practical arts are not to be classed among the sciences. [ Whewell ]

Grief! thou art classed amongst the depressing passions. And true it is that thou humblest to the dust, but also thou exaltest to the clouds. Thou shakest us with ague, but also thou steadiest like frost. Thou sickenest the heart, but also thou healest its infirmities. [ De Quincey ]

Music may be classed into natural, social, sacred, and martial; it is the twin sister of poetry, and like it has the power to sway the feelings and command the mind; in devotion it breathes the pure spirit of inspiration and love; in martial scenes it rouses the soul to fearless deeds of daring and valor, while it alleviates the cares, and enhances the innocent and cheerful enjoyments of domestic life. [ Acton ]