إنكم سترون ربكم كما ترون القمر ليلة البدر
You will see your Lord as you see the moon on the night when it is full. (Hadith reported in the two Ṣaḥīḥ collections, with wording variations)
A well-known Prophetic report compares the believers’ seeing their Lord to the unobstructed sight of the full moon. It is offered as transmitted evidence for the occurrence of vision, since rational possibility alone does not establish that a particular event will happen.
The comparison concerns clarity, absence of confusion and assurance in seeing. It does not turn God into the physical moon, place Him in a limited direction, or assign Him a finite size. One must distinguish a comparison of the act of seeing from a comparison of what is seen.