Man I worked with a dude who survived cancer. The rest of us would be stressed out at work, panicking about deadlines and shit, angry at the bosses.... And this dude would always be calm and cool. One day we asked him, "Man, you never get angry and we never see you upset". He replied, "Hey, I survived cancer, laying up in that bed fully expecting to die will give you a completely different scope of life. You'll realize all the small shit you stress about daily isn't even worth it. Just be happy that you can wake up every morning and enjoy what life has to offer no matter what it is cause at least you have that..... life."
Some of the truest words I've ever heard.