Back-to-front sonnet

In Competition No. 3068 you were invited to provide a sonnet in reverse, using as your model Rupert Brooke’s ‘Sonnet Reversed’, which turns upside-down both the form — it begins on the rhyming couplet — and the Petrarchan concept of idealised love, starting on a romantic high but ending in prosaic banality.
 
This challenge produced a delightfully varied and engaging entry. Honourable mentions go to Basil Ransome-Davies, Jennifer Pearson, David Shields, George Simmers and Philip Roe. The winners, printed below, are rewarded with £20 each.
 

Six days to build the Cosmos! I was hot!
With stars and planets, galaxies, the lot —
And life! Amoebae, microbes, dinosaurs,
Crustaceans, fish… and so on down the line.
I worked like hell to finish all my chores,
And when I looked around, it all seemed fine.
But then I started doubting what I’d done;
My motives seemed both frivolous and vague.
Creating cancer — was it just for fun?
For My sake! Why invent bubonic plague,
Or things like syphilis and leprosy?
So much that’s bad, so many chances missed…
Increasingly, I don’t believe in Me;
Today, I’m just another atheist.