It is a rather cheap approach, but I think that the novel expresses both modes being in the world. To a great extent, I think that the novel is able to articulate both with equal magnitude because Lennie and George complement one another in the different manners of being. For instance, Lennie represents the journey of emotion, while George is the intellectual analysis of experience. As both men travel together, both modes of being are evoked. It is in this where I think the novel expresses how both modes of reality are needed in the modern setting. Lennie's emotion humanizes George and for his part, George's intellectual approach strives to keep Lennie out of trouble and greater difficulty.
The characters in the novel struggle with this balance, themselves. Slim recognizes in George and Lennie how being is constructed with both focal points of reality represented. Crooks understands how intellectual pursuits through books and cerebral modes of recognition cannot supplement "a guy needing to talk to someone." Candy's hopes and dreams are rooted in both the intellectual approach to escape and the emotional hope of liberation. It is in this light where the novel does articulate that both the emotional journey and intellectual analysis of experience is what comes closer to happiness in the modern setting.