What this quote means

This classic maxim expresses a realist view of international relations: peace is not maintained by good will alone, but by a capacity for deterrence. It suggests that military preparedness is a guarantor of tranquility, as it discourages potential aggressors. A thought that has shaped defense policies, but also raises ethical questions about arms races.

How to apply it daily

In a personal conflict, prepare to defend your interests firmly, while keeping the goal of a peaceful resolution. Preparation does not preclude diplomacy.