The Buddha had the following admonition.
O, monks! Why should every female, male, layperson or priest always consider that all things they love would one day go away from them? What is the advantage of taking the said matter into consideration? Hearken, monks! All fondness and love existing in the being lead them to perform physical,verbal or mental bad deeds. Upon having always taken such matters into consideration, the being will be able to leave or lighten such fondness and love. O, monks! That is the advantage that every female, male, layperson or priest should always consider, that all things they love WILL one day go away from them.
*when I speak of being "aware" this is a good example.