My mentor once jokingly told me not to make an major life decisions until age 25, because that is when your frontal lobe, the part of the brain responsible for judgement and decision making, is fully formed.
Or maybe she was being serious.
‘Dear, dear! How queer everything is to-day! And yesterday things went on just as usual. I wonder if I’ve been changed in the night? Let me think: was I the same when I got up this morning? I almost think I can remember feeling a little different. But if I’m not the same, the next question is, Who in the world am I? Ah,THAT’S the great puzzle!’
-Alice’s Adventures in Wonderland