d'Artagnan expresses his unwavering determination, stating that no challenge can intimidate him, and his only concern lies in things that seem impossible. He shows confidence in his abilities and readiness to face any obstacle that comes his way.
The lady responds with a powerful sentiment, asserting that nothing is impossible for someone who genuinely loves. Her words suggest that love can overcome any odds, reinforcing the idea that passion and commitment empower individuals to achieve what others may view as unattainable.