What makes certain events stand out more than others and makes them more significant and lasting than others? It seems there are some events that hold more weight than others for whatever reason, either because they are inherently more important or because we value them more. Certain events like births, deaths, marriages, divorces, birthdays, anniversaries, graduations, big exams, etc. stand out in our mind as more important perhaps because we found them particularly joyous or sad, or as big achievements. It is important to have these kinds of substantial events to remember and reflect on when our lives seem mundane, to remind ourselves that we have had good (and bad) experiences in life that make living worthwhile and not so dreary.