Final answer:
One must have experienced an understanding of truth, like in Plato's allegory of the cave, to act wisely in all aspects of life, both private and public. This enlightenment influences one's actions toward the common good and aligns with a deeper natural order.
Step-by-step explanation:
To act wisely in private or public life, one must have had sight or experience of the truth, a concept deeply explored in Platonic philosophy. This aligns with the allegory of the cave presented by Plato, where Socrates discusses the enlightenment that comes from understanding the world beyond mere shadows of reality. A person emerging from the cave into the sunlight represents gaining wisdom and knowledge of the true forms and essence of things, which greatly influences one's actions and decisions in all spheres of life.
Furthermore, such wisdom often comes with a responsibility, as seen in the historical dramas where characters are urged to serve the common good above personal interests and to align their actions with the natural truth and intelligence displayed by the divine or natural order. In the realms of law, governance, and even personal conduct, having insight into the deeper workings of the world, much like the eyes adjusting to the light of the sun, allows individuals to act with greater understanding and ultimately with wisdom.