 In the Abstract, Hume concludes that it should be “easy to conceive of what vast consequences these principles must be in the science of human nature”. Since they “are the only ties of our thoughts, they are really to us the cement of the universe, and all the operations of the mind must, in great measure, depend on them” (Abstract 35). Just what these “vast consequences” are will become clear when we examine Hume’s revolutionary accounts of our causal inferences and moral judgments.