In the quote from Queen's Play by Dorothy Dunnett, the speaker urges someone to speak with great seriousness and weight, as if their words are permanent and unchangeable. The metaphor of words as letters of lead emphasizes the importance and lasting impact of what is said, implying that once spoken, consequences are unavoidable.

The speaker emphasizes the responsibility that comes with speaking, insisting that one must accept any repercussions that follow. It highlights the gravity of words and the necessity of mindful communication, underscoring that true speech carries a significant moral and practical obligation to face the outcomes it creates.