The Rig Veda (http://www.creationmyths.org/rigveda-10-129-indian-creation/) explains that beyond the existence of the universe there are things which only the lord knows: The following verses are significant in this respect:
6, Who really knows? Who can presume to tell it? Whence was it born? Whence issued this creation? Even the Gods came after its emergence. Then who can tell from whence it came to be?
7. That out of which creation has arisen, Whether it held it firm or it did not, He who surveys it in the highest heaven, He surely knows or maybe He does not!
Yet in the Gita Sri Krishna says (ch 7 v 11) ”I am the original seed of all existences ”
It is therefore clear that God was himself answering the question that He jokingly posed in the Rig Veda. This shows that God has a sense of humour.