Detailed Explanation — Wisdom (162): Assign the responsibilities of covenants to those who are as (strong) as nails.

In Wisdom (162), Imam Ali (a.s.) states that the one who keeps his secrets will have full control. This saying teaches us the importance of confidentiality and safeguarding personal information. Historically, it is noteworthy that during Imam Ali's life, there were many instances where discretion was necessary, especially when facing political and social maneuvering.

The central theme of this wisdom is secrecy. Keeping a secret is not merely about safeguarding information; it signifies the level of responsibility and understanding a person possesses in handling their affairs. Imam Ali (a.s.) emphasizes that a person who manages to keep their secrets effectively gains control over various aspects of their life.

Key phrases in this wisdom include "keeping one's secrets" and "full control." These phrases illustrate that a person who protects their secrets enhances their power and authority. The disclosure of secrets can not only impact personal life but also affect one’s reputation and honor.

The moral and spiritual lesson here is that we should strive to maintain confidentiality and embrace secrecy in our lives. This not only provides us with inner peace but also presents us as strong and dignified individuals in the eyes of others. Practically, it teaches us how to manage our personal information and discern when and to whom we should disclose it.