Taming the beast

The past and all its memories
Sometimes spring in and frequent my dreams.
The person I once was is a ghost..
That haunts the person I try to be.
The mistakes that I've made,
I can never eschew.
When things are going well...
The past moves in to take it's cue.
It comes to remind me
That though I'm renewed...
Forgetting what you've done
Breaks the cardinal rule...
Then just that quickly... It dissipates,
And my former confidence is subdued.