Touching the Void is Active Dreaming in Deep Sleep

abhāva-pratyaya-ālambanā tamo-vttir-nidra
Yoga Sūtra [1.10]

My comments: Clarity of mind facilitates the absorption of ākāśa in the dream state, nidra. The temperament of the body-mind to cultivate rest and relaxation in deep sleep provides the means by which one may witness the void (ākāśa) or the transcendent (īśvara). Yoga is clarity of mind.

The Knight’s Dream