A simple activity will show you the

A simple activity will show you the importance of the first time you meet someone. This is an experiment that may make you feel sad. If you've lost someone in your family/friends group or if you haven't met any of your family member/friend for a very long time and are not likely to meet him/her in near future, did you not, for once, think of the first time you had met that person. The feeling of nostalgia takes over and you recall the first time you met that person and the reason your lives met, the first laugh you shared, the first awkward moment you had, the first thing you did together or some other incident that cemented your relation at the level to where it was when you last met that person. This works for close acquaintances, and pets as well.
Its like walking on a road, alone or with that person, then halting and looking back at the first point on the road when you met that person.