Marilynne Robinson defines self-awareness in her essay Freedom of Thought as “the human ability to consider and appraise one’s own thoughts”. This is, in a sense, philosophy. Plato does exactly this in his dialogue The Republic. He uses Socrates to propose ideas but then uses Glaucon to consider his own proposed ideas. Throughout the two Plato readings, he focused on how mental and physical balance brings about a well-suited leader.
In Plato’s The Republic, there is a conversation for the creation of the perfect leader. In the conversation, Socrates initially proposes mathematics for a course of study for the leader on the grounds that it develops reasoning, requires persistence, and is practical. In the end, the subject does not really matter, so long that it develops the skills to think logically and critically. This is similar to Holmes opinion on a liberal arts education. He believes that it is more about the shaping of the individual rather than the vocational training. While speaking of mathematics (specifically the effects of studying it), Socrates claims that the study is necessary “if he’s going to be a human being” (The Republic 201). Seeking to answer the course question of what it means to be human, it seems to me that to be human is to develop and refine logical thinking, especially if one is to be a leader.
In speaking of the ideal leader, Socrates proposes that a sort of philosopher-king shall be best fit to rule. The leader should first be a philosopher, then a king who is not eager to rule but rather “drudges in politics… not as though he were doing a thing that is fine, but one that is necessary” (The Republic 219). A very intimate account of the creation of humans is given in Timaeus. At one point in this account, the creators create a mouth for man. It serves as an entry for what is necessary (like food), but also as an exit for what is best (like speech). The philosopher-king serves as the mouth of the body that is governed. He takes in responsibility when needed (entry) and also benefits the city with his actions (exit). It is not beneficial for him (or her) to only focus on studies, nor is it right to focus solely on war and physical well-being. The ruler must love both physical and mental labor if they are able to rule in the best manner.
In the writing Timaeus, Plato reiterates the importance of both the physical and mental. In fact, it is the “one way to preserve oneself… so that each may be balanced by the other and so be sound” (Timaeus 84). Timaeus continues to go on and mention souls. The first two mentioned are the immortal (brain) and mortal (heart) souls. The immortal revolves around intellect but the mortal revolves around sensations felt by the body. Both are undeniably important.
I’ll conclude with a personal, but related note. I have a friend who has recently started to work out every day in order to improve his physical state. On the morning of the eighth day, he said “I awoke feeling better than I have in months. I feel less agitated and my mental clarity is through the roof”. This just shows that not only are the mental and physical aspects of the body are both important, but they are actually closely related to one another.