Gratefulness is the key to a happy life that we hold in our hands, because if we are not grateful, then no matter how much we have we will not be happy—because we will always want to have something else or something more.
It's strange how much time people spend traveling round and round the circle of existence and getting nowhere. The real journey–the journey all people are required to take to achieve integration, self-realization and fulfillment–"eternal life"–is the journey inwards, the journey to the center of the soul.