It is the more necessary to urge the importance of self-knowledge, from the fact that it is a species of knowledge which every one claims, and which she would deem it almost a reflection upon her character to be supposed not to possess; while it is that very knowledge of which almost every one, of both sexes, is exceedingly ignorant.
Such an one "understands himself," is deemed quite a compliment among our sex nor is it wholly disregarded by the other. But by this expression is too often meant no more than a knowledge of the petty acts and shifts, and I might say tricks, by means of which men and women contrive to pass current in the fashionable world. How much this kind of self-acquaintance is worth, is too obvious to need illustration.
I have represented a just self-knowledge as of very great importance; but it is a science of vast extent, as well as of vast importance. A thorough knowledge of one's self includes, first, a knowledge of man in general, in his whole character—compounded as it is—and in all his relations to surrounding beings and things; and, secondly, a knowledge of the peculiarities produced by particular circumstances, condition, mode of life, education and habits.
She who merely understands all the little arts to which I have alluded, which enable us to pass current with a fashionable and grossly wicked world, will find her self-knowledge exceedingly small, when she comes to compare it with the standard of self-acquaintance set up by such writers as Mason, Burgh, Watts, &c.; and, above all, when she comes to compare it with the standard of the Bible. How little, nay, how contemptible will all mere worldly arts and shifts appear—things which at most belong to the department of manners—when she comes to understand her three-fold nature, as exhibited by the natural and revealed laws of Jehovah!
The Subjects of Anatomy, Physiology and Hygiene alone—and they teach us little more than the laws and relations of the mere body or shell of the human being—are almost sufficient for the study of a long life; and yet no individual can ever thoroughly understand herself without them: it is impossible. Anatomy shows us the structure of this body, which the Psalmist, long ago, taught us was fearfully and wonderfully made. Physiology teaches us the laws by which the living machine operates—is kept in play for seventy, eighty, or a hundred years; and Hygiene teaches us the relations of the living, moving human body to surrounding beings and objects. This, indeed, is a knowledge which few young women possess; and yet it is a knowledge which no young woman, who would do her utmost in the work of self-education, can dispense with.
She wishes, perhaps, to improve her voice by conversation, reading and singing. But is she qualified to do this in the best possible manner, while she is wholly ignorant of the structure of the lungs, the wind-pipe, and the fauces, as they are called—parts so intimately concerned in the production of voice and speech?
She wishes, perhaps, to develope and invigorate her muscular system in the highest possible degree; but how can she do this, while she knows almost nothing of the nature or power of the muscular fibre?
She wishes to develope and cultivate her intellectual powers; to acquire "firmness of nerve and energy of thought." But how can she do it, if she is ignorant of the situation and functions of the cerebral and nervous system—that wonderful organ of the intellect?
She would train her eye in the best possible manner; but how can she do so, if she is ignorant of the nature and powers of that wonderful little organ? She would educate, properly, all her senses; but how can she do it, without a knowledge of their structure, functions and relations?
Perhaps she would study the philosophy of dress, and of eating and drinking. How can she do so, till she understands, intimately, the relation of the human system to air, heat, the various kinds of food, drink, &c.?