xy

A similar remark was reportedly made by Pratchett in The Herald (4 October 2004): I'd rather be a climbing ape than a falling angel.
"I create gods all the time - now I think one might exist" (2008)
Context: Evolution was far more thrilling to me than the biblical account. Who would not rather be a rising ape than a falling angel? To my juvenile eyes Darwin was proved true every day. It doesn't take much to make us flip back into monkeys again.

“Just erotic. Nothing kinky. It's the difference between using a feather and using a chicken.”

Terry Pratchett book Eric

Source: Eric

“There is a rumour going around that I have found God. I think this is unlikely because I have enough difficulty finding my keys, and there is empirical evidence that they exist.”

Terry Pratchett (1948–2015) English author

"I create gods all the time - now I think one might exist" (2008)
Context: There is a rumour going around that I have found God. I think this is unlikely because I have enough difficulty finding my keys, and there is empirical evidence that they exist.
But it is true that in an interview I gave recently I did describe a sudden, distinct feeling I had one hectic day that everything I was doing was right and things were happening as they should.
It seemed like the memory of a voice and it came wrapped in its own brief little bubble of tranquillity. I'm not used to this.
As a fantasy writer I create fresh gods and philosophies almost with every new book … But since contracting Alzheimer's disease I have spent my long winter walks trying to work out what it is that I really, if anything, believe.

“Real stupidity beats artificial intelligence every time.”

Terry Pratchett book Hogfather

Source: Hogfather

“In the beginning there was nothing, which exploded.”

Terry Pratchett book Lords and Ladies

Source: Lords and Ladies

“Wisdom comes from experience. Experience is often a result of lack of wisdom.”

Terry Pratchett (1948–2015) English author

“In ancient times cats were worshiped as gods; they have not forgotten this.”

Terry Pratchett (1948–2015) English author

Pratchett is credited as author of this, as quoted in Ghost Cats : Human Encounters with Feline Spirits (2007) by Dusty Rainbolt, p. 7, and in Chicken Soup for the Soul : What I Learned from the Cat (2009) by Jack Canfield, Mark Victor Hansen, and Amy Newmark
Quote attributed to unknown author, in Chicken Soup for the Soul Celebrates Cats : And the People Who Love Them (2004) by Jack Canfield, Mark Victor Hansen, and Sharon J. Wohlmuth, p. 1
General sources
Variant: In ancient times, cats were worshiped as gods. They have never forgotten this.

“…'I thought the rule was that all monks were shaved.'

'Oh, Soto says he is bald under the hair,'said Lu Tze. 'He says the hair is a separate creature that just happens to live on him.”

Terry Pratchett book Thief of Time

Source: Thief of Time

“The Librarian was not familiar with love, which had always struck him as a bit ethereal and soppy, but kindness, on the other hand, was practical. You knew where you were with kindness, especially if you were holding a pie it had just given you.”

Terry Pratchett book Unseen Academicals

Source: Unseen Academicals

“And when the Patrician was unhappy, he became very democratic. He found intricate and painful ways of spreading that unhappiness as far as possible.”

Terry Pratchett book Guards! Guards!

Source: Guards! Guards!

“I would like you to teach [the orcs] civilised behaviour," said Ladyship coldly.

He appeared to consider this. "Yes of course, I think that would be quite possible," he said. "And who would you send to teach the humans?”

Terry Pratchett book Unseen Academicals

Source: Unseen Academicals