Explanation of the author's statement: "And they believe in the meaning of the saying of the Prophet (peace and blessings be upon him)

The Shaykh : He said: "And they believe", meaning the people of the Sunnah and the community, "in the meaning of the saying of the Prophet (peace and blessings be upon him)

A believer to another believer is like a building whose different parts enforce each other." The Prophet (ﷺ) then clasped his hands with the fingers interlaced

المؤمن للمؤمن كالبنيان ، يشد بعضه بعضًا وشبك بين أصابعه

Sahih al-Bukhari 2446

" Thus, the fingers are separated and weak, but when they are interlaced, they strengthen one another until you can hardly separate the hands from each other. But if you place one hand on top of the other like this, it is easy to separate them. When they are interlaced, it is difficult to separate them. So, the believer is to the believer like a building, each part strengthening the other. The building holds its parts together and supports them. Likewise, the believer with his brother: if there is a deficiency in his brother, he completes it. He is the mirror of his brother; if he finds a deficiency in him, he completes it. If his brother needs him, he helps him. If his brother falls ill, he visits him. And so on in all circumstances.
They, meaning the people of the Sunnah and the community, believe in this meaning and apply it in practice.
He said: And his saying, meaning the meaning of the saying of the Prophet (peace and blessings be upon him): The example of the Muslims in these three matters: in their mutual love, meaning the affection of some for others; their mutual mercy, meaning the compassion of some for others; and their mutual compassion, meaning the concern of some for others.
Like one body, meaning for one of his Muslim brothers, he tries to remove it and to mention the virtues that necessitate the removal of this enmity and hatred. A person does not love anyone except for a reason, and does not hate anyone except for a reason. The only bond linking Muslims is Islam. So, if you see in your brother a reason that necessitates enmity or hatred, you mention the stronger reason that necessitates what? Affection and love, so that this is removed by it, as the Messenger (peace and blessings be upon him) guided us to in his saying: The one body, if one part complains, the rest of the body responds. If your little finger hurts you, this is one of the smallest parts, the whole body feels pain, what? The whole body. If your eye hurts you, the whole body feels pain. If your ear hurts you, the whole body feels pain. If your stomach hurts you, the whole body feels pain. The important thing is that this example struck by the Prophet (peace and blessings be upon him) is a vivid example of the meaning and brings it close to the utmost degree of closeness.