The gap between how old you are and how old you think you are
I&#x27;ve felt about 22 for decades. Probably until my mid forties, I felt I was only about 19.<p>That leads quite often to the situation where you are looking in shock at some elderly, bald person in the mirror while thinking &quot;Who&#x27;s <i>that</i> old bastard?&quot;.<p>Or the sudden realisation &quot;My God! I&#x27;m only two and a bit years off 80!&quot;<p>As the article says, there&#x27;s a difference between the age you feel you are &#x27;in your head&#x27; and the age you feel you are &#x27;in your body&#x27;. This also is rather annoying as your &#x27;head&#x27; feels you can knock over a job completely in an hour or two but when you start doing it, your &#x27;body&#x27; lets you down and and you find yourself exhausted about four hours later and stop working, only about a quarter-way through the job.