In Lyrical Ballads, Wordsworth puts a question to himself: What is a poet? Then he replies: "He is a man speaking to men; a man endowed with more lively sensibility, more enthusiasm and tenderness, who has a greater knowledge of human nature, and a more comprehensive soul, than are supposed to be common among mankind". Poetry humanizes mankind. "Poetry’s object is truth, not individual and local, but general and universal. Poetry is the breath and finer spirit of all knowledge; the objects of the poet's thoughts are everywhere covering the vast empire of human society. As a result, the reader of poetry must necessarily be in some degree enlightened, and his affections strengthened. Poetry is the first and last of all knowledge - it is as immortal as the heart of man."
Source: Lyrical Ballads (1798-1800)