What Deep Words Would You Want to Write on the Walls of Your Classroom?

A high school English teacher encourages his students to write their most creative, their deepest thoughts on the walls of his classroom. The students cover the walls with original art, quotes from favorite books, and the things that are in their hearts. Many of the students look to these walls for inspiration in their own lives. The wall filled with student writings tells young people that their ideas and thoughts have value and are worth sharing with others.
If you were allowed to, what would you have wanted to write on the walls of your own classroom when you were a student? Or, what would you like to write now?