‘They come, an' they quit an' go on; an' every damn one of 'em's got a little piece of land in his head. An' never a God damn one of 'em ever gets it. Just like heaven. Everybody wants a little piece of lan'. I read plenty of books out here. Nobody never gets to heaven, and nobody gets no land. It's just in their head. They're all the time talkin' about it, but it's jus' in their head.’" (81). Crooks is saying the harsh reality of the dream, his is looking past the illusion. Another example is, when George admits he knows the dream is impossible to be achieved; “George said softly, ‘I think I knowed from the very first. I think I knowed we'd never do her. He usta like to hear about it so much I got to thinking maybe we would.’" (103). This proves how the dreams wasn’t worth that much since he already knew it never come true in the first place. But George went along with it because it helped him get through his tough life. Over all, towards the end of the novella, the author shows the the more realistic side of the illusory dream.
In conclusion, Of Mice and Men, by john steinbeck, shows that for poor migrant workers during the Depression, dreams became a illusions for every lonely worker. Lennie and George's perfect dream of life, liberty, and happiness, never becomes real be it is illusory.