We suffer for the simple reason that suffering is biologically useful. It is natures preferred agent for inspiring change. We have evolved to always live with a certain degree of dissatisfaction and insecurity, because its the mildly dissatisfied and insecure creature thats going to do the most work to innovate and survive. Mark Manson, The Subtle Art of Not Giving a F*ck: A Counterintuitive Approach to Living a Good Life

The Subtle Art of Not Giving a F*ck by Mark Manson