Judges 16:15
And she said unto him, How canst thou say, I love thee, when thine heart is not with me? thou hast mocked me these three times, and hast not told me wherein thy great strength lieth. And she said unto him, How canst thou say, I love thee, when thine heart is not with me? thou hast mocked me these three times, and hast not told me wherein thy great strength lieth.
Delilah confronts Samson with the charge that his claim to love her is false because his heart is not with her, that he has mocked and deceived her three times, and that he has withheld the secret of where his great strength lies, turning his profession of love into pressure to reveal it. Her appeal to love is a cover for betrayal, yet Samson, blinded by her influence and charms, fails to discern her purpose and ignores the repeated evidence that she is conspiring with the Philistines to destroy him. His blindness shows how seductive influence can deceive a man who gives way to desire of the flesh, which must not be confused with Christlike love.
The verse belongs to his yielding under repeated pressure, for instead of governing his passions he gave them free rein in infatuation. Unlike Joseph under temptation, he did not choose the right nor take hold of God's strength, and that failure led toward shame, disaster, and death. Captivated and infatuated by Delilah, he was taken captive by Satan and through sexual temptation and sinful indulgence betrayed into the Philistines' hands the strength God had given him, sacrificing reputation, strength, and usefulness.
In that betrayal he broke his lifelong Nazirite vow, giving to her the love and service due to God, so that his devotion became idolatry separating him from God and costing him honor and conscience. The warning extends to allowing a wife to become a snare that draws a person farther from God and causes strength to diminish. Thus seductive influence and lust of the flesh enslave and destroy those who yield to them.