To be seventy years young is sometimes far more cheerful and hopeful than to be forty years old.

Age counts years, not appetite. Someone at seventy can be curious, forward-looking and easy in company while someone at forty has already closed most of the doors in their own house. What ages a person is the loss of interest, and that can happen at any point on the calendar.

Check which direction you are currently facing. If most of your sentences lately begin with how things used to be, add one thing to the week that you have never done before. Curiosity is the part you can keep topped up whatever your age.