Based on Sima Guang's writings on his garden from the period when he lived in Luoyang, this article analyzes a theory of self-cultivation contained in the combination of his philosophy of daily life, ”Solitary Enjoyment” (du le), and his method, ”Harmony of the Mean” (zhong he), thereby considering the ways he put this theory into practice in his own life. Within the culture of Literati gatherings that flourished in Luoyang during this period, Sima's choice of ”Garden of Solitary Enjoyment” as the name for his own garden, highlights this key concept in his philosophy of daily life. For him, Solitary Enjoyment was an antidote to his personal grievances at self-imposed exile from court, while Harmony of the Mean was the means to support this philosophy of daily life. In his garden, Sima could realize his theory of Harmony of the Mean and more nearly approach an actualization of his cultivation of body and mind. Moreover, movement and meaning of the body was the most fitting expression of Centered Harmony. This combination of Solitary Enjoyment and Harmony of the Mean was thus a means to assuage his own feelings of personally wrongs. For a literatus who held to the mean and controlled his emotions, this enjoyment of Harmony of the Mean was the highest means of drawing Nature (zi ran) into Humanism (ren wen). At the same time, it was one of the high points of the Song Confucian tradition of self-cultivation.