During the scene between Spartacus and his wife, Aurelia, he begins to realize that in his freedom he still has a long journey ahead of him. He realizes that his freedom implies a responsibility and a privilege that slavery did not require. Even while he is there, finally, with his love, he is looking ahead. The mise en scene is interesting as the backdrop is a wide open, blue sky: full of possibility. Yet, there is such a sadness in his words as he (and the viewers) remember that he is still a prisoner chasing many more freedoms. As you discussed in class, there is a repeated melody that is played when the two of them are together which triggers tenderness and sympathy in the viewer.
Also interesting, is when Aurelia explains where the wind comes from, she calms him with her mythical ideas and it reminds him that he doesn't have to know everything right at that moment and that joy was allowed to be felt.
(Sorry this is late, I waited until the last minute and of course my internet went down)