Acharya Prashant addresses the tendency to dwell on past memories, explaining that while the past may seem sweet and comforting, being lost in it is a way of avoiding the living reality of the present. He uses the example of a couple looking at old photos of each other instead of embracing in the present to illustrate how people often prefer dead images over living beings. This attachment to the past usually occurs when the joy or love in the present has evaporated, leading one to live on 'eye candy' that eventually becomes unhealthy for the mind.