The quote "If words can be lethal weapons, I must provide them with an arsenal" implies that words hold immense power and can significantly impact others. The idea is that language can be used not just to communicate but also to persuade, influence, or even harm. The speaker seems to understand the weight of their words and feels a responsibility to equip themselves with the right expressions and arguments, suggesting that mastery of language is crucial in navigating complex situations.

In the context of Orson Scott Card's book "Xenocide," this perspective aligns with themes of conflict, ethics, and the human experience. The narrative often explores the repercussions of communication and the choices characters make in their interactions. By acknowledging that words can serve as weapons, the author invites readers to consider how effective communication can shape destinies and moral outcomes, reinforcing the notion that language can be both a tool for creation and destruction.