Abstract
This article explores the fate in Wittgenstein's mature work, of the issue of the unsayable, heart of the Tractatus project. According to the traditional interpretation of his work, he left behind that concern as a product of his early mistakes, later refuted in the Investigations. This article attempts to show that, in a certain sense, it is obvious that the problem of ineffability is still behind all his efforts. That it is constitutive not only of Wittgenstein's conception of language, but is also the point of what he calls the vision of aspects, on which his latest writings focus.