The purpose of this paper is to examine how characters realize their true selves by crossing the boundaries in reality. Wilde`s aestheticism plays a critical role in the characters of The Importance of Being Earnest who reveal their desire and self-realization. Wilde suggests that what is important in life is to establish a true self through The Importance of Being Earnest. Wilde completes an inversion of what has been regarded significant in the Victorian period. This play keeps on subverting the established Victorian values including the significance of "being earnest" and "marriage" as well as various literary conventions-familiar mechanisms. Many values are satirized through the multiple parodies in this play. Ernest plays as important role to Jack and Algernon as to Gwendolen and Cecily. It is important to focus on the relationship of Jack-Ernest and Algernon-Bunbury. Before their relationship is explored, it is necessary to define what Ernest is to Jack and Algernon. The systems of Ernest and Bunburying not only enable Jack and Algernon to free from any social pressure but also have an opportunity to identify their true-selves by crossing the boundaries freely. Through the continuous interactions of crossing boundaries, fixed and limited individual boundaries can be expanded upon and developed as an operating greater understanding of self. (Anyang University)