Suddenly, the woman is the one that "found [the knight] roots of relish sweet, And honey wild, and manna dew" (26-27) and "took [him] to her elfin grot"(29), which actions the knight perceives as acts of kindness and flirt. To complete her control over the knight, the beautiful lady "lulled [him] sleep"(33) and left the knight. Knight's passion towards the woman completely blinds his true control over the situation, which turns out for him very poorly at the end.
Knight blindly falls in love with a beautiful stranger that he meets the first time, however, such passion leads to ignoring the fact that this lady manipulates him, thus the knight turns out alone. As the knight sees the lady, he praises her beauty and how her "hair was long, her foot was light And her eyes were wild" (15-16). His love to her made him do anything to appease her since he "nothing else saw all day long" (22). Such love for her makes the knight mistake the circumstance and think that she is ready confess that "[she] loves [him] true"(28), by which he totally perceives the lady incorrectly. His incredible amount of affection to her blinds the knight, therefore, he is unable to realize that this gorgeous lady tricks him and leaves him with a broken heart. Knight's disregard to reality, let's the lady take him to the cave where she sings to him and "there [he] dream[s]" (34). As the knight completely gives in for control by the lady and falls asleep, "he saw pale Kings, and Princes" (37) in his nightmare where "they cried, 'La belle dame sans merci Hath thee in thrall" (39-40) and he faces the reality that he was fooled by his temptations and the lady completely overpowers the strong and manly knight.
The knight faces his epitome of beauty in the lady he encounters, which beauty is materialistic; therefore, his reliance on such physical beauty leaves him with nothing at all, since the acquaintances with such trust of physical beauty is short-lived.
