All that is other than God is brought - from their pristine state of non-existence ('adam) or that of darkness (zulma) - into existence (wujûd) or appearance (zuhûr) as a result of His casting the rays of His own Light upon them.
→ everything owes its existence to the Existence & Light of God, Allah (swt).
All the knowledge we claim to possess concerning tangible objects and spiritual entities, as well as the realitities hidden behind them, is wholly dependent upon and derived from God's knowledge.
→ any discursive attempt or rational effort at proving His existence by means of the existence of all other things provides produces no conclusive results at all. 23
Light is God, Allah is Light
If there is anything that deserves to be adequately and truthfully be called by the name 'light', it must be God alone. 22
All (our) knowledge is wholly dependent upon and derived from God's knowledge. 23