MUṆḌAKA UPANISHAD · 2.2.10

न तत्र सूर्यो भाति न चन्द्रतारकं
नेमा विद्युतो भान्ति कुतोऽयमग्निः ।
तमेव भान्तमनुभाति सर्वं
तस्य भासा सर्वमिदं विभाति ॥ १०॥

na tatra sūryo bhāti na candratārakaṃ
nemā vidyuto bhānti kuto’yamagniḥ ।
tameva bhāntamanubhāti sarvaṃ
tasya bhāsā sarvamidaṃ vibhāti ॥ 10॥

There the sun shines not and the moon has no splendour and the stars are blind; there these lightnings flash not, how then shall burn this earthly fire? All that shines is but the shadow of his shining; all this universe is effulgent with his light.

Sri Aurobindo · CWSA 18, p. 141