The liquid sealing-wax is like a mold that all the people of Brave New World are a part of. They are all part of the same mold but there are people who do not fit into this mold. Bernard and his friend Helmhotz are not like the rest of the people they are slowly breaking away from the mold.

The rock seems to signify a person who is outside the mold, but is constantly trying to break through the mold. In this book John the Savage is the rock because he was not conditioned to be a certain way. John is asking questions of many people to get them to think and he is slowly wearing down the walls of the wax.