Inspiration can come from anywhere, so you don't have to wait for Sunday's sermon or to get a Hallmark in the mail.
If you're out for a nice, leisurely stroll and a middle-aged balding man leans out of his Ford Five Hundred and screams, "Get moving, fat ass!", that can inspire you to put down the cupcake and pick up the dumbbells, even though repeated warnings from your cardiologist about angina did nothing to change your ways.