Be happy whenever you can manage it.
It's lighter than you think.
From Learning by Heart, a book written by Corita Kent and Jan Steward. Immaculate Heart College Art Department Rule 9. I came across this somewhere on a blog yesterday, I haven't read the book myself. But this, this is beautiful & sage advise. Something to take to heart...
Edit: interestingly, I came across this and the other rules again this morning; here! By chance! I guess I'm really meant to take note!