I want to have an open relationships with my students and I want them to feel safe discussing any topics, including the more difficult ones like race, culture, religion, etc. I think this saying hanging in the class will foster that idea and is a good way to show your students you are a person always willing to learn and be there for them. This is part of creating a prosocial environment, as our text described in Chapter 4.
Robert Marzano, a guru of vocabulary instruction, tells us that the bright kids need about 4 exposures to a word to own it, average students need about 14, and our struggling students need at least 40. Great exposure freebie!