"What meaning our lives may seem to have is the work of a relatively well-constituted emotional system. As consciousness gives us the sense of being persons, our psychophysiology is responsible for making us into personalities who believe the existential game to be worth playing. We may have memories that are unlike those of anyone else, but without the proper emotions to liven those memories they might as well reside in a computer file as disconnected bits of data that never unite into a tailor-made individual for whom things seem to mean something. You can conceptualize that your life has meaning, but if you do not feel that meaning then your conceptualization is meaningless and you are nobody. The only matters of weight in our lives are colored by rainbows or auroras of regulated emotion which give one a sense of that “old self.” But a major depression causes your emotions to evaporate, reducing you to a shell of a person standing alone in a drab landscape. Emotions are the substrate for the illusion of being a somebody among somebodies as well as for the substance we see, or think we see, in the world. Not knowing this ground-level truth of human existence is the equivalent of knowing nothing at all."