Crooks tells Lennie that "...he'd come lend a hand..." when he hears about their plans. Why is it significant?

Both Candy and Crooks are really lonely. The thought of actually owning something, being part of a family and feeling needed really excites them. At this ranch, they feel depressed and invisible.After Curley's wife threatens to have him lynched, Crooks feels dejected. He realizes that happy endings are impossible, especially for a black man in a white man's world.