In Ian McEwan's "Amsterdam," the character reflects on the dangers of responding to provocation with anger. He understands that writing a heated letter can backfire, as it arms adversaries with ammunition to use against you. This insight emphasizes the importance of maintaining composure and thinking carefully before reacting to conflicts.

The quote reveals a broader theme of the book, where characters grapple with moral complexities and personal integrity. It suggests that in moments of emotional turmoil, it can be wiser to pause and evaluate the consequences of our words, highlighting the significance of self-control in interpersonal relationships.