Some phrases of Plato’s Republic about the “allegory of the cave” is translated by Martin Heidegger in the beginning of this article which is originally in Greek and then he offers two interpretations.
The first interpretation belongs to Plato himself according to which it is a picture of moves man can carry out inside and outside the cave. These moves finally lead to education of the self.
The second interpretation belongs to Heidegger himself according to which not only the allegory is a picture of the self, but in fact it reflects Plato’s Doctrine of Truth. He maintains that the nature of education and truth are essentially intertwined. He argues that the development in the history of philosophy about the meaning of truth stems from this allegory. According to Heidegger, truth in the allegory has a dual meaning: on the one hand, it means what it unveils itself and removes the veil which is in the ultimate stage of the idea of good – the most unveiled and truth. On the other hand, it means congruity between object and subject.