Why do dreams sometimes fail?

Some dreams are realistic and reachable and if you try your hardest and put forth your best effort you usually succeed, but some dreams are unreachable. Some people’s dreams are reachable but they don’t want to put effort into getting to it. Some people just want there dreams to come true with out them having to work or anything. And some people’s dreams don’t come true because it was there destiny, that’s it. Most dreams that you have are usually very hard to get because life is hard. But when you become successful or one of yours dreams come true it is one of the best feelings when you earned it and didn’t get lucky. I think you can always do better than you are. You can always become better but some people don’t chose to, so their dreams wont come true. I think if you work at it and try your hardest 90 percent of the time your dreams will come true. Some people are too lazy and dint want to work to see their dream come true. But in Georges and Lennies case it just isn’t their destiny. They’re both working very hard to get the job done and live their dreams but it wasn’t meant to be.