Manoa's Ransom
Manoa's reappearance at the end of the play is ironic because, just as Samson leaves the prison to kill the Philistines, Manoa announces he has secured the deal to free him. That Manoa's ransom cannot save Samson emphasizes Samson's own dedication to acting in the name of God and Israel rather than attempting to save himself.
Samson's Strength
The concept of outward strength is called into question throughout the play. While Samson's physical strength is eventually restored, it is ironic that it is his mental and spiritual strength that bring about that restoration from God.
The Death of the Philistines
Samson's killing of the Philistines is a moment of dark irony, where the Philistines have gathered to debase Samson and celebrate their false god, Dagon. Instead, they are all killed when Samson brings the amphitheater to the ground in a moment of revenge and justice for Israel.
Samson's Freedom
Samson is offered the potential for freedom by both his father, Manoa, and his wife, Delilah. He declines both of these offers, choosing instead to remain in prison as penance for his misdeeds. When Samson finally is "freed," it is only through the act of justice that ultimately ends in his own death.
