Quote from : Speech and Power of Expression: On Language, Esthetics, and Belief Book

True poetry is composed of metaphors and symbols which are born in the heart, rise like clouds, and assume a celestial form; verses formed otherwise are not poetry, but only artificial words, each of which contradicts the feelings inside. The utterances and words that have not been formed in a person’s soul as the voice of conscience are all hollow, no matter how embellished they are or how dazzling they seem to be.