Atheists may claim not to know-But Lucifer knows
Atheists may claim not to know He is the Lord, but Lucifer and his minions know who He is-As they declared when confronted while possesing a "madman".
And there was in their synagogue a man with an unclean spirit; and he cried out,
... I know thee who thou art, the Holy One of God. Mark 1:23,24