Chapter XIII. Nature of Mind.—Regulation of the Thoughts.
A system of natural religion includes not only the existence and natural attributes of the Creator, but his moral character and the duties owed to Him, to our fellow-beings and to ourselves.
To discover these by the principles of common sense, unaided by revelation, we must again turn to our own minds as our only directory. This demands a more enlarged consideration of many of the specific powers and operations of mind, as developed by experience and observation.
Mode of regulating our thoughts.
The mode by which the succession of our thoughts is regulated is intimately connected with several subjects to be discussed, and will, therefore, first receive attention.
It will be found that our sensations and perceptions vary in vividness and distinctness according to the strength and permanency of certain feelings of desire which coexist with them. For example, we are continually [pg 060] hearing a multitude of sounds, but in respect to many of them, as we feel no desire to know the cause or nature of them, these sensations are so feeble and indistinct as scarcely ever to be recalled to the mind or recognized by any act of memory; but should we hear some strange wailing sound, immediately the desire would arise to ascertain its nature and cause. It would immediately become an object of distinct and vivid perception, and continue so as long as the desire lasted.
While one sensation becomes thus clear and prominent, it will be found that other sensations which were coexisting with it will become feebler and seem to die away. The same impressions may still be made upon the eye as before, the same sounds that had previously been regarded may still strike upon the ear, but while the desire to learn the cause of that strange wailing sound continues, the other sensations will all be faint and indistinct. When this desire is gratified, then other sensations resume their former distinctness and prominency.
Our conceptions, in like manner, are affected by the coexistence of emotion or desire. If, for example, we are employing ourselves in study or mental speculations, the vividness of our conceptions will vary in exact proportion to the interest we feel in securing the object about which our conceptions are employed. If we feel but little interest in the subject of our speculations, every conception connected with them will be undefined and indistinct; but if the desire of approbation, or the admonitions of conscience, or the hope of securing some future good stimulate desire, immediately our conceptions grow more vivid and [pg 061] clear, and the object at which we aim is more readily and speedily secured.
The mind is continually under the influence of some desire. It constantly has some plan to accomplish, some cause to search out, or some gratification to secure. The present wish or desire of the mind imparts an interest to whatever conception seems calculated to forward this object. Thus, if the mathematician has a problem to solve, and this is the leading desire of the mind, among the various conceptions that arise, those are the most interesting which are fitted to his object, and such immediately become vivid and distinct. If the painter or the poet is laboring to effect some new creation of his art, and has this as the leading object of desire, whatever conceptions seem best fitted to his purpose are immediately invested with interest, and become distinct and clear. If the merchant, or the capitalist, or the statesman has some project which he is toiling to accomplish, whatever conceptions appear adapted to his purpose soon are glowing and defined, in consequence of the interest with which desire thus invests them.
From this it appears that the chief end, or leading object of desire of the mind, will in a great measure determine the nature and the succession of its conceptions. If a man has chosen to find his chief happiness in securing power and honor, then those conceptions will be the most interesting to his mind that best fall in with his object. If he has chosen to find happiness in securing the various gratifications of sense, then those conceptions that most coincide with this desire will become prominent. If a man has chosen to find his chief enjoyment in doing the will [pg 062] of God, then his conceptions will, to a great extent, be conformed to this object of desire. The current of a man's thoughts, therefore, becomes the surest mode of determining what is the governing purpose or leading desire of the mind.