Light upon light is best understood as the power beyond, which is only possessed by Allah.
Allah exists as light upon light because He alone assumes highest level of spirituality.
His shade only accommodates those who will enjoy sufficiency of His divine Mercy.
There’s no one who will succeed in both worlds without having enjoyed the might of His Light.
Therefore, improve your relationship with Allah, for His Light will earn you best of successes.
#LightYourWayThroughAllah
May Allah count us amongst those who will be under His shade and successful in both worlds (Aameen).