Don't Audition life!

A woman I ran into on my walk said You're always smiling! No, I'm not, I actually have plenty of anger and foul moods, just ask my husband, but walking usually makes me smile. I think it's the endorphins. It helps in winter to walk towards the sun for warmth and vitamin D.
Yesterday I saw her and she said I tried the walk and I didn't smile.
I wondered what to say.

Don't audition life! Get in there and make your life happen.