Despite a generally unfavourable opinion of Shelley 's influence on his own writings and thought, Ruskin valued Prometheus Unbound for helping him to understand Aeschylus ( Works, 35.183). Ruskin also admired Shelley's sheer sensitivity to natural phenomenon although, characteristically, his praise is tinged with egotism, as Ruskin describes Shelley's 'keen sense of the material beauty, both of inanimate nature, the lower animals, and human beings, which in the iridescence, colour-depth, and morbid...mystery and softness of it...is found to the full only in five men that I know of in modern times; namely Rousseau, Shelley, Byron, Turner, and myself' ( Works, 34.342-3).