Abstract
Schopenhauer believes that differentiation is possible only where there is time or space, and therefore only in the phenomenal world: the noumenon must be one and undifferentiable. This inner one‐less of all being explains our feeling for others, the compassion on which morality is based. Thus, Schopenhauer's ethics are a practical inference from his metaphysics. At our death in the empirical world, we cease to exist as individuals, but our noumenal nature remains unaltered. Being noumenal, it is outside time, and indestructible.