If you're saying our universe's size in that other universe would be perceived by those in the larger universe as the size of a dust particle is relative to us, I agree with you. My point was that a dust speck and a universe could never be mistaken as the same thing no matter the scale if one had the ability to properly observe, measure, and test. I'm fairly certain that we're in agreement, but let me know if I'm still not understanding.
I didn't say everyone perceives light in the exact same way. What I meant was that there are objective ways to determine the properties of wave lengths and how they are perceived. The example you gave, glasses and contacts, are a product of this knowledge. We understand how someone perceives light due to imperfections in the structure of their eyes and are then able to use artificial lenses to correct it towards a standard. Rods and cones certainly don't develop at the same rate in everyone. My point was that we know how they work. Perception of color isn't random. That's why we understand that color blindness is a deviation from the preferred norm and not just a subjective perception of color. Again, I believe we are in agreement on 99% of this.
Our lifetimes constitute a certain amount of time. Compared to infinity, the amount of time we are alive represents a fraction smaller than the human mind is capable of comprehending, so small as to be insignificant. However, that isn't the same as "nothing." Nothing implies an absolute zero or nonexistence.
No, hallucinogenic drugs don't allow us to perceive what the world is really like any more than being sober allows us to see what the world is really like. That's not to say that what we experience on drugs is "incorrect." The universe exists as it exists whether humans perceive it or not. Whether we are tripping or sober, our perception of the universe is limited to the abilities of our senses and the ways in which our brain interprets them. For example, no matter what we take or don't take, we'll never be able to see ultraviolet light without artificial aids. At any given time we're only experience one tiny slice of the greater pie.
Nonsense may have been the wrong word. Let me put it this way, as long as there's no evidence to believe that we are minds existing in a platonic realm creating the illusion of our world, it remains as valid a question as "What if nobody really moves and what we perceive as movement is just the result of tiny little invisible leprechauns tugging us around?" And yes, the same goes for the question of "What if there are these forms of consciousness that exist without any detectable properties?"
Could you give me an example of something I believe in without proof?
The world definitely isn't purely black and white, and I don't see it that way. The universe is a messy place with plenty of grey areas. However, truth exists. Biologists don't see a horse born with six legs and say, "Well damn, there goes our entire classification system." They see that horse and recognize it as the result of an inherently chaotic and unpredictable universe. An entirely grey universe would result in paralysis, a world in which you couldn't step outside for fear of the asteroid that may plow into you; you couldn't stay inside because what if a panther crept into your house in the middle of the night and is waiting for you to let your guard down? Existence would be madness in such a world. So we must live as if our universe is, at least in part, black and white. And if we wish to experience the most freedom possible, it's necessary to make decisions in the closest approximation to truth as we are able.