A master of happiness will appreciate what he or she has while they have them and the moment any specific thing is gone or lost, the focus will be on other things to appreciate and be grateful for. At times, this could be gratitude for the memories that remain. Material and physical objects are temporary, memories are forever.
-Rabbi Zelig Pliskin (1999). “Happiness: Formulas, Stories, and Insights”, p.229, Mesorah Publications