How to define the moment that I write? - Michel Foucault

There has been an inversion in the hierarchy of the two principles of antiquity, “Take care of yourself” and “Know yourself.” In Greco-Roman culture, knowledge of oneself appeared as the consequence of the care of the self. In the modern world, knowledge of oneself constitutes the fundamental principle.

He who is subjected to a field of visibility, and who knows it, assumes responsibility for the constraints of power; he makes them play spontaneously upon himself; he inscribes in himself the power relation in which he simultaneously plays both roles; he becomes the principle of his own subjection.

The guillotine takes life almost without touching the body, just as prison deprives of liberty or a fine reduces wealth. It is intended to apply the law not so to a real body capable of feeling pain as to a juridical subject, the possessor, among other rights, of the right to exist it had to have the abstraction of the law itself.