It's likes "Love" ...
It's like "Idea" ...
But, What's the differrence between "Idea" and "Love" ?
..so i'll give your answer but, i think you'll find your answer before..
i hope, you'll think , find by yourself coz' it's can develop of thinking to you
&& hope you can bring it to public advantage (and ur advantage too!)
Edit : answer
You have to note idea down to keep it stay!
But, you don't have to note love down coz' love always stay...
Thanks : Mr. Roundfinger (you make me to creative guy!! 5 5+)