The Philosophy of the Upanishads c11.s3.t5.3

c11.s3.t5.3

It was first later on, with the rise of the Yoga system, that in the yoga a state of the soul gained recognition, which was exalted above deep sleep, inasmuch as that union with Brahman and the supreme bliss associated therewith, which manifests itself in deep sleep apart from continued individual consciousness retaining its memory even after waking, is realised in the yoga together with complete maintenance of the waking individual consciousness. This distinction between the yoga and deep sleep is very clearly described by Gauḍapâda :²—