Cary Tennis on struggle

Why should anything exist, if the end of existence is nonexistence? Why should we struggle toward accomplishment, which is the extinction of our desires, if our desires are what define us and give us existence? The death of all desire approaches: Why do we crave the murder of our longing? Are we so deluded that we think if we just extinguish this one more longing, that will be it, we will be free of desire, that no new longing will replace the one we quenched? Will we ever cease to long? Is this not the cycle the Buddhists talk about?