Anger is a subtle thing

I don't think of myself as an angry person
Alas, I once didn't think of myself as an emotional person
I have since proved myself otherwise.
There is something in my life now which occasions my anger to show itself
It lays dormant for a few days, or weeks,
But starts to eat parasitically at the rest of my thought-time
It lends to me certain attitudes
Which develop into habits I haven’t thought through
Subtle.