﴿ وَسَخَّرَ لَكُمُ ٱلشَّمْسَ وَٱلْقَمَرَ دَآئِبَيْنِ ۖ وَسَخَّرَ لَكُمُ ٱلَّيْلَ وَٱلنَّهَارَ ﴾

“and has made the sun and the moon, both of them constant upon their courses, subservient [to His laws, so that they be of use] to you; and has made the night and the day subservient [to His laws, so that they be of use] to you.”

And He has disposed for you, the sun of the spirit and the moon of the heart, constant, in journeying through unveilings and witnessings, and He has disposed for you, the night that is the darkness of the soul's attributes and the day that is the light of the spirit in order to seek livelihood and [means to] the final return, as well as rest and illumination.