Plato believed that art is essentially mimetic and used ‘mimesis’ in different ways to express what the product of a craftsman is on a scale of diminishing degrees of reality and knowledge (from knowledge [pure thought and reason] to opinion [belief and illusion]), in relation to the true objects of knowledge – the Forms. Using the example of a bed: the eidos of Bed, made by the god is a unique, eternal and unchanging and therefore fully real essence, embodied in all beds.
A bed made by a carpenter participates in the essence of Bed, but because it is in the world of change, is less real. An artist’s painting of the bed is a mere image or illusion because it is only of the appearance of the bed – the bed painted from one perspective, as though seen in a mirror – so the painting is thrice removed from true reality and knowledge. Similarly, the mimesis produced by the poet (who creates pictures with words) is the re-presentation of life – mere imitation.
While an artist can paint a bit and bridle he does not understand the form that is proper to these objects, he has neither knowledge nor correct belief of what he depicts because he has no experience of them. The smith and leather-worker can make them – but even they don’t have the understanding of them that the horseman has. As with the soul, the tripartite Platonic divisions apply in the arts: here – the art of use, the art of making and the art of representation. The implied equation between ‘art of use’ and (knowledge of) eternal reality is on the basis of ‘complete engagement with’ – developed in Neoplatonism. The poet is the counterpart of the painter – their work too is thrice removed from reality, for the same reasons. The poet knows nothing more than their own craft – how to re-present appearances. They have no knowledge on the basis of experience of what they write about but employ their mere imagination.
Plato held that the only poetry that should be allowed in the commonwealth is that which praises the gods and ‘good’ men. He had particular hostility to ‘imitative’ poetry because it was to this that the Greeks had traditionally looked for moral and intellectual guidance (his prime target was Homer). He wanted to establish philosophy as that sole source, denying not only the parallels between poetry and philosophy – that they were both art forms that could be literary and pedagogical, but also the cognitive potential of poetry and the arts. He believed that ‘wisdom’ could be gained not through the study of the poet’s portraits of heroes but only through rigorous dialectic.
He argued that whereas (his) philosophy had as its summum bonum true knowledge on the basis of reason’s engagement with what was most real through strict training, the poet’s (particularly tragic) aim was to appeal to the ‘non-rational’ part of the soul and the arousal of emotion in their audience, on the basis of the poet’s imitation of appearances. The experience of the emotions aroused would then carry over into the daily lives of the citizens, to their detriment.
What was particularly threatening to Plato (because of his sensitivity to and capacity for inspiration and his determination to deny lived emotions and change with his controlled, rationalist system, and whom Guthrie correctly described as a philosophical theologian) was that the poet is ‘divinely inspired’. Poets work from inspiration not (linguistic) reason, they don’t understand the meaning of their language, they present a semblance of life with no grasp of reality. Such poetry, like all art, is play and not to be taken seriously. Thus Plato argued that the poet should be not allowed into a just commonwealth ‘because he stimulates and strengthens an element which threatens to undermine the reason.’
Driven by his antipathy to change and his incapacity to accept its necessity and by the manifestation of this in his division and opposition between ‘reason’ and ‘emotions’, Plato banished from his republic (from what was in effect his model for the perfection of self) that which, as evidenced by his own writing, he had the deepest appreciation of – poetry – and those whose business it was – including, by implication and most particularly, himself.