With Mother's Day around the corner, this Opinion Video asks: Is it possible to be a great mom and have a great career? That question has plagued the filmmaker Shaina Feinberg. Before Ms. Feinberg was born, her mother dreamed of a successful career as a performer — then gave up those dreams to raise her daughters. That loss still haunts her mother. Now a mother herself, Ms. Feinberg is confronted with the same dilemma: Should she quit working as a filmmaker to be a full-time mom? Or keep doing