فَإِنْ تَفُقِ الْأَنَامَ وَأَنْتَ مِنْهُمْ فَإِنَّ الْمِسْكَ بَعْضُ دَمِ الْغَزَالِ
If you surpass all people while being one of them, that need not be impossible: musk, too, is traditionally described as deriving from the gazelle's blood.
The praise claims that someone belongs to humankind yet exceeds ordinary people in excellence. The poet uses the familiar traditional account of musk to show that sharing an origin does not exclude an exceptional distinction.
Subject: an exceptionally distinguished human.
Model: musk as a remarkable product associated with a common origin.
Purpose: to illustrate possibility.