Genesis 1:1

את - The "Accusative Direct Object Marker" or, The Mark of the Eternal Self?

Strongs Definitions gives:

אֵת ʼêth, ayth; apparent contracted from H226 in the demonstrative sense of entity; properly, self (but generally used to point out more definitely the object of a verb or preposition, even or namely):—[as such unrepresented in English].

See "Mark of the Eternal Self" for complete analysis.