Detailed Explanation — Wisdom (350): There are two types of knowledge, one that settles in the self and one that is only heard and conveyed, it does not benefit unless it is established in the heart.

This wisdom of Imam Ali (a.s.) provides profound insight into the nature of oppression. The historical context is significant, as it reflects a time when the Islamic community faced various challenges, particularly from tyrannical rulers like Yazid and his followers. Imam Ali (a.s.) consistently advocated for justice and raised his voice against oppression.
In this wisdom, three key signs are outlined to identify an oppressor. The first sign is that the oppressor transgresses against the higher authority, meaning he disobeys Allah. This is a spiritual and moral issue, where an individual violates the commands of their Creator.
The second sign is that the oppressor exerts tyranny over those who are weaker than him. This indicates that he abuses his power to oppress the vulnerable. The third sign is that he supports other oppressors, meaning he collaborates with like-minded individuals to perpetuate injustice. This represents a dangerous form of oppression at both individual and collective levels.
Through this wisdom, Imam Ali (a.s.) teaches us the importance of raising our voices against oppression and recognizing these signs to promote justice and equality in our societies. This is not only a moral obligation but also a spiritual responsibility.