In one of my class lectures, I raised this question to my students, the fish is in the water or the water is inside the fish, the answer was obvious, fish is in water.
So the ‘thing’ is always smaller than its container. It is always the container which is larger than the ‘thing’ being contained in there. So in its entire life time a fish can not explore all the oceans, because it (fish) is smaller than the ocean.
In order for me to see something, I have to be bigger than that thing. The universe, it is said is comprehensible by human mind, that means the universe has to be smaller than the human mind and the ONE who has created the human mind has to be bigger than the human mind, so it is not possible for we humans to see that INVISIBLE FORCE (the CREATOR) and since I am unable to see HIM that does not give me enough justification not to believe HIM.
I am unable to see air and micro organisms all around me but I do believe in their existence by virtue of knowledge, which I have acquired using that beautiful gift of HIM, the MIND.
That probably is the reason why Einstein said ‘Imagination is more important then knowledge’, because knowledge at one point in time becomes limited but imagination is wild in nature.
That’s the reason why, we are able to imagine, because we can imagine any thing be it smaller in size or larger than life. That possibly is the reason that humans have been capable of doing wonders through imagining a thing first and then making it really happen.