The verse says...
The verse says: “He knows the unseen and the seen, He is the Great, the Most High.” Imam Sadiq (as) has declared on the first phrase of the above verse that: The unseen signifies what has not existed and /šah adat/ (seen) signifies what has existed already. ^1 In the meantime, Allah (s.w.t.) is superior in every aspect of perfection and is cleared of whatever default and defect there might be.
This noble verse, which is apparently an explanation of and complementary to the previous verse, is one of the many verses of the Qur’an which refers to Allah’s knowledge as to the small and big, open and hidden acts of man and even man’s thought and intentions. If men believe in such knowledge by Allah, it can be the best factor in one’s modesty and virtue and the greatest means for one’s education for it can encourage the righteous and warn the evildoers.
It is interesting that, in this verse Allah has mentioned the fact of His knowledge unto the secret speech and hidden acts done at night before referring to open words and the manifest activities in the day.
The verse says: “It is alike (for Him) whether any of you conceals his speech or speaks openly, and whether he hides himself by night or he who exposes himself during day-time.” The Arabic term /s arib/ is derived from /sarib/ which originally means ‘running water’ though it also refers to the one who goes on with a job during the day.
At any rate, Allah’s knowledge is identical with respect to all things, unlike our knowledge and our awareness is relative with respect to the things, in some cases it is deeper while in other cases, it is less deep or at zero point in some cases.