I like this saying because it encourages that mistakes are ok to make. I expect my students to show effort in the work that they do, and mistakes are fixable and acceptable as long as they keep trying. I would put this saying on a poster (on vinyl sticker like the one here) and keep in my classroom to remind students that it is ok to make mistakes.
"I can be a…." Through science, technology and math, many careers are possible. Here are just a few: software developer, doctor, meteorologist, astronaut, dentist, architect, veterinarian, airplane pilot and biologist. This poster shows many more to inspire your students.