Surah 16. An-Nahl, Ayah 83

I.e., although they are aware of the many blessings which man enjoys, they refuse to attribute them to God's creative activity, thus implicitly denying the truth of His existence. My rendering of al-kafirun as "[such as] are given to denying the truth" is conditioned by the definite article al which, in the above construction, is meant to stress the quality of deliberate intent.

'Arafa is distinguished from 'alima is implying a specific discernment (or recognition) of various qualities and uses. All mankind recognised the value of the blessings they enjoy, but in forgetting or disobeying their Author, the wicked show gross ingratitude; for in practice they deny their obligation to Him for those blessings.