Myths that Every Child Should Know – Edited by Hamilton Wright Mabie – Introduction – Paragraph 3

When a man sneezes, people still say in some countries, “G*d bless you.” They do not know why they say it; they simply repeat what they heard older people say when they were children, and do not know that every time they use these words they recall the age when people believed that evil spirits could enter into a man, and that when a man sneezed he expelled one of these spirits.