Who said "The universe is a lot older than six thousand years."?

This quote is attributed to Aziraphale.

The universe is a lot older than six thousand years. - Aziraphale

"The universe is a lot older than six thousand years."

Aziraphale Knowledge

Character in Good Omens

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"An angel is not inflexible. It is just that angels are very good at seeing the bigger picture."

"You can't trust demons. They're not reliable. I should know."

"The Apocalypse would be a terrible thing. Thank God it's averted."

"Books are like humans. Some of them contain great wisdom. Some of them are just paper."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."