You probably don't need to be told happiness is good for your health. You can feel it.
Yes, there are studies that show that daily affirmations don't work for everyone. But wise words from famous women, film, and literature can still be inspiring — even if they don't manage to change your life, and make you a healthier person. At the very least, they'll improve your mood. At their best, they can power you through the hectic work day.