THE OTHER

Whilst the subject (or the ‘I’) exists both in-itself and for-itself (en-soi et pour-soi), it does not exist in isolation but alongside other subjectivities, and therefore has a third mode of existence, described as ‘being-for-others’ (être-pour-autrui). [...] This relationship inaugurates a dialectic of desire, in which the subject strives after an object that is always in the possession of the other.

David Macey, Dictionary of Critical Theory, Penguin Books.