Ruth Marcus writes for The Washington Post: “Sheryl Sandberg has burst into tears in the office, more than once. She has failed at such crucial Mommy Tasks as remembering to dress her son in a green shirt for St. Patrick’s Day — inwardly seething at the officious super-mommy who chided her sartorial shortcomings and worrying, I’m a bad mom. Sandberg spent her college years — her Phi Beta Kappa at Harvard college years — constantly feeling like she ‘was about to get caught for not really knowing anything.'”