Yeats was interested in imagination as he was familiar with the function and value of imagination. For him, Imagination is a kind of creative principle; it is like an almighty divine god. By using and developing the power of imagination we can do anything. The ultimate aim of imagination is to create a paradise in this world from now to eternity. It is, however, too difficult to make such images, as we wish to. Though difficult, it is not impossible to do so. According to Bergson, the possible and the real are not essentially different qualities; they are originally the same attributes; furthermore, all material things are to be formed by the gathering together of images―the world of imagination consists of numerous images. Thus, we, with the marvellous power of imagination, can have the infinite power and intelligence, which resemble those of God. Nonetheless, we are sad for many human conditions that restrict us. But Yeats praises the human souls that overcome such conditions with full arduous life. As he awakens mentally, he comes to find the concept of taking pains -labor-; he needs to make constant efforts to realize the imagination as he wants it, wholeheartedly. To Yeats, such a hard process of living itself is man's sublimity. He concludes that in struggling against the terrible condition of life man will come closer to the attributes of God.