This workshop will describe how Jung’s approach to the psyche and to psychotherapy arises out of his philosophical commitments. I will show how his is a philosophy of idealism, and how he does not see the psyche as merely a product of the brain. I will discuss Jung’s rejection of metaphysics but how he also reveals his personal metaphysical beliefs, especially his monism, based on the idea of the unus mundus. I will show how Jung acknowledges a spiritual dimension to the psyche, in contrast to most other forms of psychology, especially in terms of his ideas about the Self and the objective psyche as a source of religious experience. I will discuss the debate about Jung’s status as a scientist. Finally, I will describe how Jung and Wolfgang Pauli tried but failed to find common ground between depth psychology and quantum mechanics based on their common interest in synchronicity.