Human nature often drives people to rely entirely on their own judgment. However, the true dividing line between foolishness and wisdom lies in the ability to question one's own perception and listen to others. There is a sharp contrast between how a foolish person and a wise person view reality.
The primary approach among commentators is that a foolish person possesses excessive self-confidence and considers himself incredibly smart. Because of this blind faith in his own choices, his path always appears perfectly straight in his own eyes. Convinced of his own rightness, he refuses to accept criticism or seek guidance. As a result of this stubbornness, his plans inevitably unravel and he fails [רלב״ג, אבן עזרא, מצודת דוד, ביאור שטיינזלץ]. This condition is much like a patient who is completely unaware of his illness, or someone whose senses are so distorted that bitter tastes sweet. He is actually walking a crooked path, yet remains absolutely certain that it is perfectly straight [עמנואל הרומי]. On another level, this foolishness manifests when a person chooses a lifestyle of material pleasures. In the short term, this path looks easy and straightforward. Yet, by doubting the rules of wisdom and rejecting warnings, he ignores the reality that such a direction ultimately leads to ruin [מלבי״ם].
In stark contrast, a truly wise person is someone who investigates, seeks clarity, and remains constantly open to the perspectives of others [ביאור שטיינזלץ]. Even when an individual is highly capable and fully justified in relying on their own independent intellect, they still choose to lend an ear to outside counsel [רלב״ג]. This does not mean accepting every random suggestion; rather, the goal is to carefully listen to the guidance of a wise and worthy advisor [עמנואל הרומי].
Even if a person firmly believes their current direction is correct, the mere willingness to consult others, weigh different opinions against their own, and look ahead to future consequences is what strips away the label of a fool and earns them the title of a wise person [אלשיך]. In a profound sense, the wise individual internalizes the principles of wisdom. By listening to sound advice, they are empowered to choose a path of lasting happiness and life, even if that road initially appears difficult and full of thorns. They refuse to be deceived by whatever simply looks easy in the present moment [מלבי״ם]. Ultimately, it is not just that a wise person happens to listen to advice, but that the very act of listening to others is what makes a person wise in the first place [מצודת דוד, ביאור שטיינזלץ].