But this principle of the connexion of fear with uncertainty I carry farther, and observe, that any doubt produces that passion, even though it presents nothing to us on any side but what is good and desirable. A virgin, on her bridal-night goes to bed full of fears and apprehensions, though she expects nothing but pleasure of the highest kind, and what she has long wished for. The newness and greatness of the event, the confusion of wishes and joys, so embarrass the mind, that it knows not on what passion to fix itself; from whence arises a fluttering or unsettledness of the spirits, which being, in some degree, uneasy, very naturally degenerates into fear. Thus we still find, that whatever causes any fluctuation or mixture of passions, with any degree of uneasiness, always produces fear, or at least a passion so like it, that they are scarcely to be distinguished. I have here confined myself to the examination of hope and fear in their most simple and natural situation, without considering all the variations they may receive from the mixture of different views and reflections. _Terror, consternation, astonishment, anxiety_, and other passions of that kind, are nothing but different species and degrees of fear. 'Tis easy to imagine how a different situation of the object, or a different turn of thought, may change even the sensation of a passion; and this may in general account for all the particular subdivisions of the other affections, as well as of fear. Love may show itself in the shape of _tenderness, friendship, intimacy, esteem, good-will_, and in many other appearances; which at the bottom are the same affections, and arise from the same causes, though with a small variation, which it is not necessary to give any particular account of. 'Tis for this reason I have all along confined myself to the principal passion. The same care of avoiding prolixity is the reason why I waive the examination of the will and direct passions, as they appear in animals; since nothing is more evident, than that they are of the same nature, and excited by the same causes as in human creatures. I leave this to the reader's own observation, desiring him at the same time to consider the additional force this bestows on the present system. SECTION X. OF CURIOSITY, OR THE LOVE OF TRUTH. But methinks we have been not a little inattentive to run over so many different parts of the human mind, and examine so many passions, without taking once into consideration that love of truth, which was the first source of all our inquiries. 'Twill therefore be proper, before we leave this subject, to bestow a few reflections on that passion, and show its origin in human nature. 'Tis an affection of so peculiar a kind, that it would have been impossible to have treated of it under any of those heads, which we have examined, without danger of obscurity and confusion.