[Jzen]

great Pronunciation Key (grt)
adj. great·er, great·est
Very large in size.
Larger in size than others of the same kind.
Large in quantity or number: A great throng awaited us. See Synonyms at large.
Extensive in time or distance: a great delay.
Remarkable or outstanding in magnitude, degree, or extent: a great crisis.
Of outstanding significance or importance: a great work of art.
Chief or principal: the great house on the estate.
Superior in quality or character; noble: “For he was great, ere fortune made him so” (John Dryden).
Powerful; influential: one of the great nations of the West.
Eminent; distinguished: a great leader.
Grand;

[Dimensio]

I'm aware of the various definitions of "great", but I don't know to which one you refer when you speak of a "greater being" than humans. An elephant is larger in size than a human, so is an elephant a "greater being"?

Also, what's the relationship between telling the truth in court and belief in deities?