Tristram’s claim that the hobby-horse is a superior method for understanding human nature is perhaps not as ridiculous as it may seem, as the hobby-horse is but another way of describing a person’s strongest passions and interests. Moreover, in suggesting his theory of hobby-horses, Tristram also implies that other theories of human nature are equally arbitrary attempts to make sense of the mysteries of the mind. Before explaining his theory, however, Tristram once again insists upon another digression.