In "Twenty Years After" by Alexandre Dumas, the character D'Artagnan reflects on the profound nature of friendship. He emphasizes that true friendship is deeply rooted in sincerity and honesty, suggesting that these qualities strengthen the bonds between friends. D'Artagnan believes that those who deny the existence or value of friendship are often misguided and lack the ability to appreciate its significance.

This perspective highlights the idea that friendship is not merely a social construct but a fundamental aspect of human relationships that requires trust and integrity. D'Artagnan’s insights remind us that only those with malicious intentions can fail to grasp the true essence of friendship, which is built on mutual respect and genuine connection.