What influences you?
The one thing I have noticed is that when I don't exercise, I am a serious grump. When I am a serious grump, I have a tendency to emulate and almost enhance the negativity around me. If someone's cursing or just being generally negative, I have a tendency to do the same and make the group energy pretty bleak.
Then I go to my aikido class, and I feel better. Why?
I figured out a long time ago, that when I physically feel bad, my mental and emotional state is likewise affected(or is it effected? know what? I don't care). I was feeling a bit of selfpity, a bit of blackness, projecting my negative thoughts into situations to paint the bleak picture instead of being rational and realizing it's all me projecting.
Wasn't having a great week last week, not sleeping enough, frustrated, blah...Realized I was in a bad place (sometimes I do, sometimes I don't) and decided I would change my perspective. Just deciding doesn't help, deciding to go to class and go to class helps.