Rumi's Masnavi - This outward (light) is (derived) from the sun and from Suhá, while the inward (light) is from the reflexion of the beams of (Divine) Glory.

This outward (light) is (derived) from the sun and from Suhá, while the inward (light) is from the reflexion of the beams of (Divine) Glory. 1125

این برون از آفتاب و از سها ** و اندرون از عکس انوار علی‌‌

The light which gives light to the eye is in truth the light of the heart: the light of the eye is produced by the light of hearts.

نور نور چشم خود نور دل است ** نور چشم از نور دلها حاصل است‌‌

Again, the light which gives light to the heart is the Light of God, which is pure and separate from the light of intellect and sense.

باز نور نور دل نور خداست ** کاو ز نور عقل و حس پاک و جداست‌‌

At night there was no light and thou didst not see the colours; then it (the light) was made manifest by the opposite of light (by darkness).

شب نبد نوری ندیدی رنگها ** پس به ضد نور پیدا شد ترا

(First) comes the seeing of light, then the seeing of colour; and this thou knowest immediately by the opposite of light (darkness).

دیدن نور است آن گه دید رنگ ** وین به ضد نور دانی بی‌‌درنگ‌‌

God created pain and sorrow for the purpose that happiness might be made manifest by means of this opposite. 1130

رنج و غم را حق پی آن آفرید ** تا بدین ضد خوش دلی آید پدید

Hidden things, then, are manifested by means of their opposite; since God hath no opposite, He is hidden;

پس نهانیها به ضد پیدا شود ** چون که حق را نیست ضد پنهان بود

For the sight fell (first) on the light, then on the colour: opposite is made manifest by opposite, like Greeks and Ethiopians.

که نظر بر نور بود آن گه به رنگ ** ضد به ضد پیدا بود چون روم و زنگ‌‌

Therefore thou knewest light by its opposite: opposite reveals opposite in (the process of) coming forth.

پس به ضد نور دانستی تو نور ** ضد ضد را می‌‌نماید در صدور

The Light of God hath no opposite in (all) existence, that by means of that opposite it should be possible to make Him manifest:

نور حق را نیست ضدی در وجود ** تا به ضد او را توان پیدا نمود