Plato: Possibility of the existence of the not written doctrine

Abstract

The Ancient Age introduces uncountless problems to the specialists of the same one. On one hand, we have problems related with the direct sources, and, for other, with the indirect sources. Same Plato points out, in the Letter VII, that his dialogues don't contain the fundamental teachings, but it belongs exactly to him of who the work is conserved in its entirety. There is our problem : What to make? To discredit the platonic work in benefit of a supposed non existent doctrine? To reconstruct a doctrine having already one written by the own Plato? Inevitably this platonic statement raises the problem that is denominated as the occult doctrine or not written doctrine.