"But if this right in the master over the slave be conceded there are of course conceded all other rights necessary to insure its possession. Hence, inasmuch as the slave can be held in this condition only while he remains in the lowest state of mental imbecility, it supposes the master to have the right to control his intellectual development, just as far as may be necessary to secure entire subjection. Thus, it supposes the slave to have no right to use his intellect for the production of his own happiness; but, only to use it in such manner as may conduce to his master's profit. And, moreover, inasmuch as the acquisition of the knowledge of his duty to God could not be freely made without the acquisition of other knowledge, which might, if universally diffused, endanger the control of the master, slavery supposes the master to have the right to determine how much knowledge of his duty a slave shall obtain, the manner in which he shall obtain it, and the manner in which he shall discharge that duty after he shall have obtained a knowledge of it. It thus subjects the duty of man to God entirely to the will of man; and this for the sake of pecuniary profit. It renders the eternal happiness of the one party subservient to the temporal happiness of the other. And this principle is commonly carried into effect in slaveholding countries. If argument were necessary to show that such a system as this must be at variance with the ordinance of God, it might be easily drawn from the effects which it produces both upon _morals_ and _national wealth_. Its effects must be disastrous upon the _morals_ of both parties. By presenting objects on whom passion may be satiated without resistance and without redress, it cultivates in the master, pride, anger, cruelty, selfishness and licentiousness. By accustoming the slave to subject his moral principles to the will of another, it tends to abolish in him all moral distinction; and thus fosters in him lying, deceit, hypocrisy, dishonesty, and a willingness to yield himself up to minister to the appetites of his master. The effects of slavery on _national wealth_, may be easily seen from the following considerations:-- Instead of imposing upon all the necessity of labor, it restricts the number of laborers, that is of producers, within the smallest possible limit, by rendering labor disgraceful. It takes from the laborers the natural stimulus to labor, namely, the desire in the individual of improving his condition; and substitutes, in the place of it, that motive which is the least operative and the least constant, namely, the fear of punishment without the consciousness of moral delinquency.