It is very early on Saturday morning, and basically, I couldn’t sleep last night. I am excited to leave town for a few days to get away from it all. To be honest, this is not about technology at all. I did publish a brand new essay on technology this morning — We are all trapped in the “feed.”

And while lying on the bed, I started thinking about age. Again. My post about longevity elicited many emails — thank you by the way for sending them along — and perhaps triggered a lot of thinking around age and time.

What is age? Is it a number? Or is it a state of mind? Is it a reflection of our biology? Or is it really about our brain and perception? I bet, we all have different views on this. American poet Samuel Ulman once said:

Youth is not a time of life;
it is a state of mind;
it is not a matter of rosy cheeks, red lips and supple knees;
it is a matter of the will, quality of the imagination, a vigor of the emotions;
it is the freshness of the deep springs of life.

When you are young, everything is interesting, and you can be enthusiastic about anything. That is what makes life so much fun. And now if you are old and yet find everything exciting and are excited about everything thing, then are you really old?

When I think about my life as a person, writer and investor, I believe when I stop being enthusiastic, that is when I will get old.

As actress Sophia Loren said:

There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age.

May 26, 2018, San Francisco

Originally sent out as an email newsletter.