Detailed Explanation — Wisdom (382): Whenever he graced the pulpit, it was rare that he did not say these words before the sermon. O people! Fear Allah, for no one has been created in vain to indulge in sport, nor has he been left unchained to engage in folly, and the world which is adorned for him is not a substitute for the Hereafter which his wrong vision has presented in a bad light.

In Wisdom (382), Imam Ali (a.s.) articulates a crucial principle regarding the responsibility of knowledge and speech. This wisdom teaches us that we should express our knowledge wisely. It is better to remain silent about things we do not know. This not only preserves our own dignity but also aids in guiding others effectively.

This wisdom reflects a time when ignorance and misunderstandings were prevalent among people. Imam Ali (a.s.) encouraged the importance of knowledge and its proper utilization during his era. He made it clear that on the Day of Judgment, Allah will question us about our actions and knowledge, hence we must exercise caution in our speech.

The phrase 'do not say what you do not know' conveys the message that silence is preferable in the face of ignorance. Simultaneously, 'do not say everything you know' implies that we should present our knowledge in a reasonable and appropriate manner. This teaches us that not every piece of information needs to be shared, and sometimes silence holds more meaning.

Morally and spiritually, this wisdom reminds us of the greatness of knowledge and the responsibility it entails. We should use our knowledge correctly and exercise caution when guiding others. Practically, it teaches us to maintain balance in our conversations and to refrain from speculation about things we are not certain of.