What is Marifatullah?

Could you give information about “marifatullah”?

Marifatullah is to know the names and attributes of Allah (swt), to try to get to know Him (swt) and live in accordance with the consent of Him (swt).
It is to consider yourself in the presence of Allah (swt) and to perform every action in accordance with His consent.
It is the essence, source and basic of all knowledge of fact.
It is reflection on the works of art of Allah (swt) and contemplation on the Quranic facts.