…and radiance (the mental powers that enter during the time of suckling). The concept of radiance (הארה, he’arah) applies because according to the way the Chariot appears in prophetic vision, the resultant light is itself a radiation (הארה, he’arah) of light.
The revelation of the offspring from the higher luminary to the outside is what is called birth. This is obvious since everything follows the underlying Likeness of Man.
The legs of Arich Anpin sustained the broken vessels; the folding of the legs repaired and elevated them.