अव्यक्ताद्व्यक्तय: सर्वा: प्रभवन्त्यहरागमे | रात्र्यागमे प्रलीयन्ते तत्रैवाव्यक्तसञ्ज्ञके ॥18॥
avyaktād vyaktayaḥ sarvāḥ prabhavantyahar-āgame rātryāgame pralīyante tatraivāvyakta-sanjñake
avyaktāt—from the unmanifested; vyaktayaḥ—the manifested; sarvāḥ—all; prabhavanti—emanate; ahaḥ-āgame—at the advent of Brahma’s day; rātri-āgame—at the fall of Brahma’s night; pralīyante—they dissolve; tatra—into that; eva—certainly; avyakta-sanjñake—in that which is called the unmanifest
With the coming of day all manifested things emerge from the Unmanifest and when night comes they merge in that itself which is called the Unmanifested.