These periods always keep up the neverending and eternal worlds. They who know Brahma, O child, regard this as Immutable Brahma.
एतानि शाश्वताल्लोकान् धारयन्ति सनातनान्। एतद् ब्रह्मविदां तात विदितं ब्रह्म शाश्वतम्॥