The believers are a body

Great for bridge building:

Nu’man b. Bashir reported Allah’s Messenger (may peace be upon him) as saying: The similitude of believers in regard to mutual love, affection, fellow-feeling is that of one body; when any limb of it aches, the whole body aches, because of sleeplessness and fever. (The Hadith, Sahih Muslim, #4685)

But God has so composed the body, giving greater honor to the part that lacked it, that there may be no division in the body, but that the members may have the same care for one another. If one member suffers, all suffer together; if one member is honored, all rejoice together. (1 Cor. 12:24-26)