Analysis of River of Regret

Past deeds swept under the bridge
in the river of regret
should be gone ’cause they can’t be changed,
but, alas, they plague me yet.

Stalled in a swirling eddy,
they flood me with reminders of sin.
I want to forget my errors,
but I’m reminded again and again.  

Why do they still swamp my mind,
accusing and full of blame?
What is done is forever done,
but I drown in them just the same.