A good reflection. In Marcus's case, I agree his statement makes little sense if we interpret "temporary" in a cosmic sense. Marcus has no eschatology. He is not suggesting that some day all vice will end. He is saying each particular vice he will encounter that day will end; however insulting or personally injurious it may seem, its life and effects are temporal and therefore limited. In good Stoic fashion, he is saying his own lifespan exceeds those of vices, so they are definitively endurable. The soul is greater than the vices it encounters.
A good reflection. In Marcus's case, I agree his statement makes little sense if we interpret "temporary" in a cosmic sense. Marcus has no eschatology. He is not suggesting that some day all vice will end. He is saying each particular vice he will encounter that day will end; however insulting or personally injurious it may seem, its life and effects are temporal and therefore limited. In good Stoic fashion, he is saying his own lifespan exceeds those of vices, so they are definitively endurable. The soul is greater than the vices it encounters.