What we have is the time between our birth and death of which we need to sleep for one-third of it. We have also been given a free body which has its own life and death, a free mind to store and analyse what we experience and emotions which we can use for making ourselves happy and then sharing it to others around us. The body dies, memories die, mind also dies along with your death. You may want to maximise the time when you are happy during your life. A person who is able to keep himself happy under all circumstances is the most happiest person on earth.