–noun [i-pif-uh-nee] a sudden, intuitive perception of or insight into the reality or essential meaning of something, usually initiated by some simple, homely, or commonplace occurrence or experience.
When you smile, the whole room lights up. When you smile, my world seems alright. When you smile, I could tell a story about why you did so, and maybe somehow I'd be right. When you smile, I know you're happy.