Buying milk, a huge step
The puzzle
A woman bought a carton of milk at the supermarket.
She paid at the till and went home.
For her, doing that was an enormous undertaking.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
She had barely left the house for years, because of severe anxiety.
Going to the shop alone and buying one thing was the goal she and her therapist had set.
That day she did it.
