Age is not so much a number as it is a state.
5 is a state. When you are a 5 year old kid, you are in a certain situation, in mind, body, circumstances.
You are short and live with parents, you express yourself well and mostly about things that seems trivial to adults -occasionally asking far too complex questions. At 5 you get dressed and undressed by yourself and use the restroom, you can write some letters and numbers, and your day is centered around play and chores.
17. What picture is created in your mind?
Probably you at that age, or your friends. Scruffy teen, emotions controlled by a tornado of hormones, erratic actions, desperate to belong, feeling invincible. Ring a bell? No clear plans for the future yet, but probably lots of dreams and a vague timeline on when big events will happen.
40. What is that to you?
A mature, wise, accomplished person? A few wrinkles, a solid career peppered with promotions and advancements along the way, maybe grown children, someone without insecurities and ready to dish out sound advice to anyone who asks.