The moonlike face of Kṛṣṇa is the reservoir of nectarean songs and the abode of His flute. It is also the root of all bodily beauty. The gopīs think that if their eyes are not engaged in seeing the beautiful face of Kṛṣṇa, it would be better for them to be struck by a thunderbolt. For the gopīs, to see anything but Kṛṣṇa is uninteresting and, indeed, detestable. The gopīs are never pleased to see anything but Kṛṣṇa. The only solace for their eyes is the beautiful moonlike face of Kṛṣṇa, the worshipful object of all senses. When they cannot see the beautiful face of Kṛṣṇa, they actually see everything as vacant, and they desire to be struck by a thunderbolt. They do not find any reason to maintain their eyes when they are bereft of the beauty of Kṛṣṇa.