Why is God giving Satan a preferential epistemological treatment?

In Christian tradition there is a least one character with full conscious knowledge of God’s existence that chooses not to worship God, namely Satan. Evidently, humans seems not be that favored in having satisfactory evidence for God’s existence (as witnessed by the wild Christian internal disagreement, different denominations and schisms of the original faith; not to mention all the non-Christians). Why is Satan entitled to a such privileged epistemological certainty while humans are not?