In insincere people, the lack of wisdom is one of the most apparent symptoms of their spiritual states. People deceive themselves by believing in their own interpretations and ignoring the truth, which leads to spiritual and material harm. This is especially seen in those with weak faith who lack wisdom and fail to measure their behavior against the Quran. By not taking the Qur'an as their guideline, they turn away from Allah and succumb to their selfish desires. This leads to a lack of spiritual fulfillment and a lack of understanding of one's true relationship with Allah. Allah speaks of a special type of wisdom granted only to those who fear and take refuge in Him.

People who lack this wisdom and become distanced from the morality of the Qur'an cannot distinguish right from wrong. This deficiency leads to spiritual and physical lethargy, and material and spiritual impurity. Allah grants purity and spiritual light to those who believe in Him with a sincere heart.

Those who lack faith and sincerity, however, are afflicted with spiritual impurity, and the negative "vibes" they emit can be felt by others, manifesting itself in a lack of illumination in their faces and a darkening of their expressions. Even with great care in personal hygiene, these people cannot save themselves from this spiritual lack. When they turn towards Allah with sincerity, however, they are blessed with a beauty and health that brings a blessing to those around them.