I'd come to the conclusion everything happens for a reason over the years, and although I've heard the saying from others plenty of times, I'm sure that my conclusion is entirely based on my experiences and not something I'm repeatedly saying because I've heard it before. I'm always quite fascinated that so many people come to this conclusion though I'm still not sure I understand the reason why...
Each to their own :) There is no use repeatedly explaining something to someone if it holds no relevance or resonance :)