There is a magical moment in the latter half of life when adults have a chance to reinvent themselves. They take on new names: Nana, Grandma, Bubbeh, Poppy, Grandpa, Zayde. They cast themselves in new roles: caregiver, mentor, pal, pamperer. They are filled with powerful new emotions that make them feel alive and vital. They become grandparents.
"Every time a child is born, a grandparent is born too," says grandparenting guru and retired child psychiatrist Arthur Kornhaber. The bond between grandchild and grandparent is second only to the attachment between parent and child. Kornhaber calls it "clear love" because it has...