You're not always "conscious" of something as in sleep there is a "dream consciousness" of little or marginal comprehension and of course deep sleep which to our way of thinking is "unconscious" . We, in a sense, work within "day consciousness" but its not the whole puzzle.
There are some; in past, present and future, who are able to stay "intact" and able to be consciously aware of the experiences of deep sleep or what we may call our "unconscious time".
The study and comprehension of Man is inextricably interwoven with this realm of the "unconscious" for without consideration of Man's entry into sleep we are left with a emptiness of thought as to what is the nature of Man.
Within Man, in our present existence, we work this "unconscious" realm as our "will" and in imagery our metabolic limb digestive system. This "unconscious" realm is also the source of our mathematics and so just as we don't wait for knowledge of our metabolic/limb digestive system in order to digest (we would die then) we also bring mathematics to the fore in our science , an exploration of the realities of Man.
The spirit and soul of Man "thinks, feels, and wills" and the external expression of these three realms is our nervous system, cardiovascular /respiratory system and our metabolic limb/ digestive system, respectively. The most "unclear" or "unconscious" is the realm of the ""will". Hello Schopenhauer...