لم تلق هذا الوجه شمس نهارنا إلا بوجه ليس فيه حياء
The sun of our day faces this countenance only with a face devoid of modesty.
The conventional comparison likens a bright face to the sun. Here the claim is reversed and intensified: the praised face is so brilliant that the sun's willingness to confront it is depicted as shamelessness. The audience must connect solar brilliance, praise, and an imaginative attribution of modesty.
The line thus gives indirect praise rather than a simple statement about visual form. A familiar comparison is made comparatively remote by changing the angle from which its meaning is approached.