The concept of having a moral high ground is a key aspect in this play. The play makes the spectator question what morality means to each person. Furthermore, the play makes one question the struggle between what is right for the individual versus what is right for the group. It is possible that this struggle is irreconcilable. More specifically, one can see this struggle by looking at what has happened to Philoctetes versus what the Greeks need.
Another theme is that of trauma. Philoctetes suffers wounds that do not heal. Furthermore, Philoctetes' suffering is now what defines him, yet Neoptolemus pretends not to know Philoctetes at first. In other words, Philoctetes' suffering should at least make him known, but it is as if his story is dead.[3]
