How do you deal with things out of your control?

Just recently a friend of mine was diagnosed with malignant melanoma (a type of skin cancer for those of you who don't know) and the prognosis is very poor since the cancer has metastasized to a level where it has invaded other nearby tissues, and they pretty much can't do anything for him now.

I often wondered why bad things like this happen to perfectly good people. Sure, maybe he had a little too much uvB exposure over his lifetime or whatever, but still, he did nothing to deserve this. It's not like you're talking shit to someone's face and then getting punched out because of it (you know, cause and effect).

Or maybe like people that are born blind, deaf, or mute. They did nothing to cause their own suffering, they were just born that way. Or how about someone being hit and maimed by a drunk driver, and now they are a paraplegic/qudriplegic? It's just not fair. And sometimes when I am dealt a hand like this, I wonder why and curse the heavens. How do you deal with things like this that are out of your control without going batshit insane? And it's worse when people act like it was your own fault that bad shit happened to you.

How ya doing, buddy?