He who, dwelling in space, whom space does not know, whose body is space, who controls space from within —He is your Ātman, the Inner Ruler, the Immortal.

Ākāśa (space/ether) is the subtlest of elements, the one that contains all others. If even space —the condition of possibility for all manifested existence— does not know its inner ruler, how much less the denser elements? In our yoga practice, meditating on space leads us to the frontier of conceptual thought. The space between two thoughts, the space in the heart —there dwells the antaryāmin, beyond all form but the source of all forms.