This essay compares Jalāl al-Dīn Rumi's Masnavi and Dīvān-e Shams with Rabindranath Tagore's Gitanjali and The Gardener, but it asks a narrower question than the one usually put to these two poets. The question isn't whether they share a common mysticism. It's what longing does to the structure of the self that feels it. Read as a process rather than a mood, longing moves through four recurring stages in both poets — longing, encounter, expansion, and a return to or expansion of relation — and in neither case does it end in the erasure of self that “mysticism” is often assumed to require. Rumi's fana loosens the boundaries of the ego before baqa carries a transformed self back into the world. Tagore's devotional self is relational from the start and expands toward the infinite without giving up its particularity. Read alongside, though not through, Emmanuel Levinas's account of metaphysical desire, the two trajectories converge on a structurally comparable model of selfhood: a self-enlarged by relation rather than closed off by possession. I call this outcome boundlessness-in-relation.