Unlike some of the Romantic poet, Keats didn't give so much importance to the poetic form. His poetry was very original: the self of the poet disappeared and the poetical personal pronoun “I” was linked to an universal human being. He used a personal figurative language, that was characterized by the large use of synesthesia’s (a common speech that is a mixture of different sensations, for example smelling and touching). So Keats’s poetry was full of sensations, of perceptions. The central theme of his poetry was the searching for beauty.
BeautyThe contemplation of beauty was the main theme in Keats’s poetry and it was inspired by the classical Greek world. According to Keats beauty was the ideal of all type of art, and he identified beauty and truth. For this reasons Keats is considered a precursor of the Aestheticism and Victorian writers, according to the principle “Art for art sake”.
Physical beauty and spiritual beautyAccording to Keats, beauty can be physical or spiritual. While physical beauty is temporary and derives from the sensitive world (for example the beauty of a women, or of a painting), spiritual beauty is eternal, derives from spirit and it is linked to the idea of love, of friendship, of art, of poetry.
They are not in opposition but they are interconnected: physical beauty is the phenomenal expression of spiritual beauty.