There is something within you which cannot stand boundaries. Or, in other words, there is something within you which wants to become boundless. What can be boundless? A physical form can be small or big, but never boundless. There is something within you which is longing to touch a dimension which is beyond the physical.
There is something within you which is longing to be spiritual. “Spiritual” does not mean looking up or looking down, or praying or going to the temple. “Spiritual” essentially means you are in an experience which is beyond the limitations of the physical. That means you are in a boundless space. This longing is always there in every human being. Either you are approaching it in installments, or you are consciously going for the Ultimate.