Mode, Knowledge, Mortality

Spinoza's proposition that the essence of a Mode consists in its effort to persist in its being, entails that any knowledge of its finitude can be derived only from its knowledge of God, i. e. from the self-knowledge that it is no more than a modification of Substance.  In other words, its knowledge of God entails that of its own mortality.  Accordingly, his contention knowledge of God reveals its immortality seems a lapse into the consoling anthropocentrism that he fervently opposes elsewhere, an anomaly in the context comparable to a sudden conclusion from Copernicus that the discovery of Heliocentrism by an inhabitant of Earth proves Geocentrism.  So, Spinoza's concept of Wisdom in the Ethics vacillates from the knowledge that one is mortal, to the knowledge that one is immortal, an apparently irreconcilable vacillation.