The answer is: A fool

Ecc 2:14

In the often enigmatic book of Ecclesiastes, we dive into profound themes about life, wisdom, and folly. The contrast between the wise man with "eyes in his head" and the fool who wanders in darkness is vivid—a delightful play between insight and ignorance. But what exactly does that darkness symbolize? It’s not just the absence of light; it's the absence of understanding and clarity, often resulting in missed opportunities or misguided choices.

Interestingly, ancient wisdom literature frequently underscores this theme. In Proverbs—Ecclesiastes' companion text—we find repeated calls to seek wisdom and understanding. This duality between wisdom and folly becomes a guiding principle throughout the scriptural tradition, accentuating a holistic worldview where knowledge illuminates one's path through life's complexities.

Trivia alert! Did you know that the author of Ecclesiastes is believed to be King Solomon, famed for his wisdom? This connection enriches our understanding since he allegedly authored Proverbs as well, bridging these lessons across multiple texts in the Bible.

Now, when you read "eyes in his head," remember it’s not just a feeble metaphor! In ancient Near Eastern culture, the eyes were often viewed as windows to the soul, symbols of perception and insightful clarity. A fool, in walking darkness, may stumble through life, neglecting the guiding light of wisdom's counsel while the wise are illuminated by careful observations and judicious actions. What an invitation to seek light in our own undertakings, and embrace wisdom!