A smile is an expression of joy or delightful amusement. But it is also a way of giving that costs nothing. Smiling, like yawning, is contagious. This is actually a reflex God added to our design. We tend to respond to people with a like expression to theirs as part of our brain’s way of interpreting and understanding what they are feeling. So when you smile, you are gifting that smile and potentially lifting the spirits of another.