Daniel R. Porterfield, president of Franklin & Marshall College (PA), writes:  One of the hot topics on campuses this year is “grit,” which University of Pennsylvania psychologist Angela Duckworth understands as a fusion of passion, aspiration, tenacity and resilience that launches people to success. Her important new book, Grit: The Power of Passion and Perseverance, challenges educators and institutions to see and strengthen this mind-set in our students.