In the beginning when God created the heavens and the earth,
the earth was a formless void...
...Then God said, ‘Let there be light’; and there was light. -Genesis 1:1
I liked this one very much. If you really see the symbol of NULL you've used here, it really cancels out whatever would've otherwise been a 0, a circle, complete figure.The NULL symbolizes absence of everything, vacuum in some sense. Anything in its place, wouldn't be NULL. so to say NULL shouldn't have had a symbol in the first place ;)