The phrase "mysterious laws of the cosmos" refers to the scientific principles and theories that govern the universe, many of which still remain unknown and unexplained. There are numerous synonyms for this phrase that capture the enigmatic and inexplicable nature of these laws, including cosmic mysteries, the enigmas of the universe, the hidden principles of the cosmos, the inscrutable laws of the heavens, the occult workings of the universe, and the arcane forces of the cosmos. All of these synonyms emphasize the awe-inspiring and impenetrable nature of the universe and the ongoing quest to understand its secrets.