Describe symbolism in Friedman's Fables by Edwin H. Friedman

In the fable, Interlude, Cassandra is given the gift of prophecy by the god Apollo, but after refusing his sexual advances, he places a curse on her that she should never be believed. Cassandra's story symbolically comments on the futility of attempting to relate more to the future than to the present, of attempting to take more responsibility than one should or is even possible, and of attempting to define one's identity by what might be rather than by what is.