All deep things are Song. It seems somehow the very central essence of us, Song; as if all the rest were but wrappages and hulls! The primal element of us; of us, and of all things. The Greeks fabled of Sphere-Harmonies: it was the feeling they had of the inner structure of Nature; that the soul of all her voices and utterances was perfect music. Poetry, therefore, we will call musical Thought. The Poet is he who thinks in that manner. . . . See deep enough, and you see musically; the heart of Nature being everywhere musical, if you can only reach it.
Thomas Carlyle, Heroes and Hero Worship