Everyone has the ability to increase resilience to stress. It requires hard work and dedication, but over time, you can equip yourself to handle whatever life throws your way without adverse effects to your health. Training your brain to manage stress won't just affect the quality of your life, but perhaps even the length of it.
I think that life is difficult. People have challenges. Family members get sick, people get older, you don't always get the job or the promotion that you want. You have conflicts in your life. And really, life is about your resilience and your ability to go through your life and all of the ups and downs with a positive attitude.