Iago's 'I am not what I am' epitomises how Shakespeare's work is rich in philosophy, from issues of deception and moral deviance to those concerning the complex nature of the self, the notions of being and identity, and the possibility or impossibility of self-knowledge and knowledge of others. Shakespeare's plays and poems address subjects including ethics, epistemology, metaphysics, philosophy of mind, and social and political philosophy. They also raise major philosophical questions about the nature of theatre, literature, tragedy, representation and fiction.

The Routledge Companion to Shakespeare and Philosophy is the first major guide and reference source to Shakespeare and philosophy. It examines the following important topics:

The Routledge Companion to Shakespeare and Philosophy is essential reading for students and researchers in aesthetics, philosophy of literature and philosophy of theatre, as well as those exploring Shakespeare in disciplines such as literature and theatre and drama studies. It is also relevant reading for those in areas of philosophy such as ethics, epistemology and philosophy of language.