Really, it’s the way our mind works. We have memory, sharp or faulty. Many of our thoughts today come to us out of the memories of our yesterdays. Almost everyone has them, unless severely handicapped perhaps. Thus I am confident and I can happily report easy obedience, almost automatic to this command: to remember!
“Remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them;”(Ecclesiastes 12:1)
[bold emphasis mine]
If we have obeyed this from our youth, perhaps this one could have a happier ending:
“The days of our years are threescore years and ten ; and if by reason of strength they be fourscore  years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away.”(Psalms 90:10)
If we have applied ourselves to wisdom from our youth, that extra ten years or more may very well be filled with the joy of the Lord and a certain expectation of a brand new resurrected body. Eternity.
Remember: hindsight, a backward glimpse at my own life, one which only I am privy to unless I choose to express it in detail to another. However, it, my life, remains only mine in experience to do with as I will. I may remember with fondness, or I may remember with regret and remorse, this still remains a fact: my yesterdays are who I have become.
“Memory is the scribe of the soul.”Aristotle