"The Best Laid Plans"

Perfect plans just don’t exist
No matter how you try.
It’s possible to nail the gist
But other parts won’t fly.

For circumstances do contrive
To ruin the precision
With which you kept your hopes alive
The way you did envision.

“The best laid plans of mice and men”
Is such a brilliant quote;
When Robert Burns put down his pen,
He knew a gem he wrote.

Such simple words and so succinct,
They perfectly suffice
To mark their message, long-time inked,
For us and also mice.