laṅkāṁ vibhīṣaṇa-dṛśāviśad agra-dagdhām
Great mountain peaks covered with trees and plants were thrown into the sea by the monkey soldiers and began to float by the supreme will of the Lord. By the supreme will of the Lord, many great planets float weightlessly in space like swabs of cotton. If this is possible, why should great mountain peaks not be able to float on water? This is the omnipotence of the Supreme Personality of Godhead. He can do anything and everything He likes, because He is not under the control of the material nature; indeed, material nature is controlled by Him. Mayādhyakṣeṇa prakṛtiḥ sūyate sacarācaram: only under His direction does prakṛti, or material nature, work. Similar information is given in the Brahma-saṁhitā (5.52):
yasyājñayā bhramati sambhṛta-kāla-cakro
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
Describing how material nature works, the Brahma-saṁhitā says that the sun moves as desired by the Supreme Personality of Godhead. Consequently, for Lord Rāmacandra to construct a bridge over the Indian Ocean with the help of monkey soldiers who threw great mountain peaks into the water is not at all wonderful; it is wonderful only in the sense that it has kept the name and fame of Lord Rāmacandra eternally celebrated.