Everything and Nothing
When I was young, sometimes I would see a tutor after school. She was this old but very posh lady, who was said to be able to predict what her students would be when they grew up. She had been doing this for years and had never been wrong. A veterinary, a nutritionist, an artist... 16 years later I can confirm she was right. I had to ask! What will I be? She starred me in the eyes for a while and whispered "I don't know."