। ॥ ९५८ ॥
In plain words
It shines the way the supreme Brahman shines — one form, and nothing in it ever changes. Waking, dream, deep sleep: through all of them runs this single unbroken current, and this is what has always been called the fourth.
Close to the Sanskrit
It shines forth like the supreme Brahman, having one form free of modification; the one stream in all the states, it has been proclaimed as bearing the name 'the fourth'.