Why is knowledge considered a virtue in Stoic Philosophy?

Knowledge, specifically wisdom, is considered a cardinal virtue in Stoic philosophy because it provides the foundation for making sound judgments and acting in accordance with reason and nature. Wisdom is not simply the accumulation of facts, but the ability to understand the underlying principles of the universe and human nature, and to apply that understanding to practical life. It is the intellectual virtue that guides all other virtues, enabling one to discern what is good, bad, and indifferent, and to choose the most virtuous course of action in any given situation. Without wisdom, courage can become recklessness, justice can become misguided, and temperance can become apathy. Knowledge, in the form of wisdom, allows individuals to understand the Stoic principles of virtue, the dichotomy of control, and living in accordance with nature, enabling them to live a more rational, virtuous, and fulfilling life. For example, a wise individual understands that external events are indifferent and that true happiness comes from cultivating inner virtue, allowing them to navigate challenges with equanimity and make choices that are aligned with their values.