When we appeal to the consolation that life goes on anyway, we do not actually look forward for new experiences. In fact, we expect that the rest of our life would bring us similar experiences which those we left away.
The common experiences which keep us into them have not a linear development: we do not go from a point to another one. They have a circular nature. We can stay longer only in those states which repeat themselves constantly.
For instance, we walk through the repetition of our steps, we work through the repetition of the days of work, and we love through the repeated physical or mental presence of the same person in our life.
All these are performed by using the visible round parts of our body: the roundness of our limbs and fingers, the round parts of our face which is primarily involved into the social activity of working, or the roundness and curves of the sexual organs. Thus, we bear a physical reflection of our circular activities.
When we cease those activities, our sight of the future is imbued with the physical roundness of our body. The optimism arises from the impossibility to believe that our round body can be used for other activities than those common circular experiences we have known in the past. Even when we have the pessimistic feeling that we will fall down in the future, we imagine that we will roll to a certain edge. Only other people will see clearly that we simply fell (notice that the obituaries tell about someone’s life in a linear, chronological way).