So much to keep in your head! History and holiday traditions and anniversaries and birth dates of family members. The human brain constantly sifted through data and memories, retaining what would be useful in the future and deciding what could be discarded, and it did this day after day, year after year, for decades on end. Astounding how much stuff rattled around in a person’s noggin. No wonder some of it leaked out on occasion.
These things become a part of who we are as we move through life. The best "lifeline" I ever had was clinging to the Word of God.