Definition: The word 'ideol' was coined by the Irish writer William Butler Yeats in his poem "Nymphs" (1907). The term means 'the soul of an animal, or human being'. The word originated from the Latin phrase "ideo", which translates to 'thought', and "loge", meaning 'heaven' or 'place of heaven'. In the poem, Yeats describes how an ideal is like a soul that exists only in one place. The idea that the soul of an animal (or human) is always connected to its own essence (or nature), and that it lives within itself but never truly becomes separated from the world around it, is central to Yeats's vision of the modern individual.