When we survey with a philosophic eye the varied and complicated works of nature, there is nothing upon which the mind rests with more pleasure, than the contemplation of the harmony, the order, and the unity of design, manifested throughout. The physical philosopher points to the centripetal and centrifugal forces, to the annual and diurnal revolutions of the earth, to the periodical return of the seasons, the regular succession of day and night, to the laws of cohesion and repulsion, and shows with pride the wondrous harmony which exists in all the departments of the physical world, all working and conspiring to one great end. The political economist delights to look to the nations of the earth, composed of vast multitudes of individuals; to scan the great variety of occupations which the endless division of labor has generated, and to see how the almost countless millions of inhabitants, although each one is busily and selfishly engaged in the pursuit only of his own little narrow schemes, are nevertheless, when we embrace the grand whole, working, in as perfect harmony and accord, as if the spirit of unbounded wisdom and universal philanthropy guided every head and touched every heart.--While to the common observer, the great volume of the human mind is uninteresting, with its pages confused and scattered like the sybil leaves of antiquity, it becomes to the metaphysician who can arrange and interpret it, a source of knowledge, of pleasure, and of gratitude. He beholds the nice lineaments of feelings and passions--observes the operations of our various intellectual powers and faculties. He sees a beautiful harmony and unity of design in the whole Ideal Republic; and finds with wonder and astonishment, that all our passions, instincts and faculties are so nicely arranged in relation to each other, that, like the bodies in our planetary system, not one could be struck from existence without endangering the harmony of the whole. Thus shall we find, look where we will, through the wide range of nature's works, part corresponding to part, power to power, mind to mind, and to matter too; and the whole moving forward with that beautiful harmonious action, which at once demonstrates the illimitable wisdom of the designer,--his benevolence and his consistency. Among all these beautiful adaptations in the universe, there is not one perhaps, which presents itself to the mind under a more engaging, a more interesting aspect, than the relations of the _sexes_. To increase and multiply, seems to be the great law of animated creation; and the attractions by which the sexes are brought together for the fulfilment of this universal law, are so many, so complicate, and yet so beautiful and delightful, while shedding their benign influence over the rugged journey through life, that it is impossible to contemplate them, without an immediate acknowledgment of their sublime harmony, and of the benevolent design of him who ordered and established them.