This research is an attempt to study the concept of the self, not only on theoretical grounds but also on account of its poetic expression in some of the selected works of the American poet Walt Whitman (1819-1892) and the Eastern poet-philosopher Allama Muhammad Iqbal (1877-1938). A true understanding of the concept is not possible without first defining the parameters of the self. In this context, I review the concept of the self in Philosophy, Mysticism (and Sufism) and Psychology. The self that I reflect upon is basically the mystical self represented in the works of Walt Whitman and Allama Muhammad Iqbal.