教师是学校里最重要的师表，是直观的最有教益的模范，是学生的最活生生的榜样。
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.
"El pasado es un país extranjero; allí hacen las cosas de otra manera."
Mathematics is a creative endeavor, just like art or music.