Simply because its restricted by your vision of the horizon.
and as for the red part, I completely agree, for a drop the ocean is infinity, for a thought, its application is infinity and for a soul, something science cant define, realization is infinity.
I am not a scientist sis, but I am trying to find an answer based on tangible evidences to find something intangible..
may sound idiotic but there is a reason why, questions were planted in human heart, called as curiosity if we always had to find things based at numbers.Our brother Orionhunter is not wrong at all. but there are things you cant prove factually but they do exist.