In philosophy, a subject is a being which has subjective experiences or a relationship with another entity (or "object").
Subjectivity is thus a kind of structural effect - what happens when Nature is diffused, refracted around a field of negativity and the "unity of the subject" for Hegel, is in fact a second-order effect, a "negation of negation".
Michel Foucault's critique of the subject and the oxymoron "Historical subject"
The point of philosophy is to start with something so simple as not to seem worth stating, and to end with something so paradoxical that no one will believe it.
Philosophy consists very largely of one philosopher arguing that all others are jackasses.
Philosophy is a battle against the bewitchment of our intelligence by means of language.