If we understand and accept the fact that we are not a permanent fixture on mother earth then we will surely lean of temporary superficial goals in our life.Our goals goes from superficial to spiritual from early on. So its better to decide from the very begining that we will die and then think what will be worthwhile to do when we are alive. This helps us in valuing our time on earth. We will look more to develop our mind through spiritual practice rather then wasting our time on distractions like Endless talking, gossiping, sports , war etc.
If we think that we will not die then we are more prone to putting of spiritual practice and wasting our time on trivial pursuits rather than making good use of our time. Pursuit of physical happiness only might not be the best use of our time. Physical comfort is just temporary absence of problems like diseases or any body discomfort ( For e.g feeling cold)
Again going overboard might not do us any good when it comes to pursuit of physical comfort and happiness. So food is needed to sustain our body. But when we eat too much food we tend to bring in a hoard of other complications like Heart disease and Obesity. So its important to have a balance so that we can achieve Happiness of mind and heart and not just of our physical well being.