ويقبحُand is ugly منfrom سواكanyone but you الفعلthe act عنديin my eyes
ويقبحُ من سواك الفعل عندي
فتفعلهthen you do it فيحُسنُand so becomes beautiful منكfrom you ذاكthat
فتفعله فيحُسنُ منك ذاك
And an act done by anyone but you is ugly in my eyes;
It is ugly for anyone but you to do it
yet you do it, and that act becomes beautiful coming from you.
If you do it, it becomes beautiful from you