Now alone, Dalila contemplates her chances of success. Samson, intent on taking his place as the leader of the Hebrew revolt, emerges to say his last farewell as distant lightning is once again seen. In an attempt to close the trap which she has set for Samson, Dalila tells Samson seductively that she is completely his if he wants her. She begs him to respond to her caresses, hoping that he will finally let go of all other things and concentrate completely on her. His admission Je t'aime! introduces her main aria "Mon cœur s'ouvre à ta voix - My heart opens to your voice", which becomes a duet on the second verse when Samson joins her in song. Now that Dalila has him in her power, she feigns disbelief in his constancy and demands that he show his love by confiding in her the secret of his strength. Samson hears rolling thunder again which now seems like a warning from God and refuses. Dalila weeps and scorns Samson and runs into her dwelling. Samson is momentarily torn but then follows Dalila inside. Not long afterward, having finally learned that the secret of Samson's strength is his long hair, she calls to hidden Philistine soldiers, who rush in to capture and blind Samson.