A theory on how the brain processes and remembers time is that it counts time by the number of experiences. For example, if you attend a party and meet many new people and have an exciting, fun time, then your brain will remember that day as feeling longer and with much more detail. In contrast, a normal, boring work day may not even register as a memory, because there is nothing new to remember.
This sounds obvious, but the theory has relevant implications.
Look back on your past week and try to remember what you did. Do you remember the weather three days ago, what you talked about with your friend over coffee five days ago, or what song was playing while you were doing paperwork?
It is not uncommon for our brain to go into autopilot and forget menial, daily routines. In other words, the more standardised and automated your daily life is, your brain will remember those times as “less time”. Ergo, the life you look back on is shorter than what it could have been if you stop having new experiences. Is that not such a waste?
Compare this to when you travel or start a new relationship. You are exposed to so many new stimuli and experiences that your brain light ups and frantically records every detail (the heightened emotions play a role also). This is why we can remember the scent of our partner, the conversations we had with a stranger we met in a French bookshop, and what movie was playing in the background when you had your first kiss. These are moments that you can remember in better detail than you can remember entire years.
The bottom line is that a boring life a short life. A way to make the most of the short time we have in life would be to continue having new experiences as we grow old. Travel the world, meet new people, try things you normally wouldn’t, fall in love and push your horizons.
Otherwise, you may end up on your deathbed looking back on your life, regretting that your highlight reel is much shorter than you expected.