This thesis is one particular response to the broad question, "What is mathematics?" The answer proposed within is that mathematics is a universal language. This answer is taken in the reference of a universal language meaning something that can be found to some degree in a variety of different subject areas. With that in mind, three specific areas are chosen for discussion of how mathematics is at the heart of them. These three main areas are music, art, and literature with a special emphasis on poetry. Also included are paragraphs on how mathematics relates to areas besides those dealt with in the main concentration of the discourse. The paper concludes with several famous mathematical quotations to explicitly explain the fact that mathematics can be viewed as a universal language. As a whole, this thesis provides credence to the answer of the question that many people ask of mathematicians. Which is, why do they need to learn mathematics.To which, mathematics educators answer that mathematics is an universal language through which one can gain access to a vast realm of knowledge. Mathematics--it is the universal language of all things.