Why are some things so difficult to express verbally? In the words of Lao Zi, "The Tao that can be can be expressed is not the eternal Tao". Do we lack the ability to define these sort of things, like art and such, or are the they simply impossible to define? Or do we just lack the appropriate understanding and 'vocabulary' to really say definitively and indisputably what these verbally ambiguous terms are? Is it a question of linguistics, or human limitations?