In encounter with each other and our fundamental aggression, we flee conflict and sublimate our basic drive for power. This is philosophical crime at its most heinous. Thus Nietzsche grounds religion in the human needs of the insecure person. Although Nietzsche was openly hostile to Christianity and religion in general, despised Christian virtues, ridiculed theology and and the metaphysical systems of others, he indulged in a theoretical system of his own, which revived the Greek notion of the eternal recurrence of all things. He died insane, after spending the last eleven years of his life believing himself to be Jesus Christ.
Dualism opposes 'interior' to 'exterior' in the existent.
A superficial covering which hides from sight the true nature of the object. The 'secret reality' of the thing which one can suppose but never reach because it is the 'interior', the 'true nature'. In Existentialism , these distinctions do not exist. The dualism of Being and Appearance is not allowed any legal status within the philosophy of existentialism. The appearance refers to the total series of appearances and not to a hidden reality which encompasses the true being of the existent.