All the most important occasions of our lives are capable of being subjected at pleasure to a decision, as nearly as possible, perfectly voluntary.
Still it remains true that, when the understanding clearly perceives rectitude, propriety and eligibility to belong to a certain conduct, and so long as it has that perception, that conduct will infallibly be adopted. A perception of truth will inevitably be produced by a clear evidence brought home to the understanding, and the constancy of the perception will be proportioned to the apprehended value of the thing perceived. Reason therefore and conviction still appear to be the proper instrument, and the sufficient instrument for regulating the actions of mankind.
Having sufficiently established the principle that in all cases of volition we act, not from impulse, but opinion, there is a further obstacle to be removed before this reasoning can be usefully applied to the subject of political melioration. It may be objected, by a person who should admit the force of the above arguments, "that little was gained by this exposition to the cause it was intended to promote. Whether or no the actions of men frequently arise, as some authors have asserted, from immediate impression, it cannot however be denied that the perturbations of sense frequently seduce the judgement, and that the ideas and temporary notions they produce are too strong for any force that can be brought against them. But, what man is now in this respect he will always to a certain degree remain. He will always have senses, and, in spite of all the attempts which can be made to mortify them, their pleasures will always be accompanied with irritation and allurement. Hence it appears that all ideas of vast and extraordinary improvement in man are visionary, that he will always remain in some degree the dupe of illusion, and that reason, and absolute, impartial truth, can never hope to possess him entire."
The first observation that suggests itself upon this statement is that the points already established tend in some degree to set this new question in a clearer light. From them it may be inferred that the contending forces of reason and sense, in the power they exercise over our conduct, at least pass through the same medium, and assume the same form. It is opinion contending with opinion, and judgement with judgement; and this consideration is not unattended with encouragement. When we discourse of the comparative powers of appetite and reason, we speak of those actions which have the consent of the mind, and partake of the nature of voluntary. The question neither is nor deserves to be respecting cases where no choice is exerted, and no preference shown. Every man is aware that the cases into which volition enters either for a part or the whole are sufficiently numerous to decide upon all that is most important in the events of our life. It follows therefore that, in the contention of sense and reason, it cannot be improbable to hope that the opinion which is intrinsically the best founded shall ultimately prevail.
But let us examine a little minutely these pleasures of sense, the attractions of which are supposed to be so irresistible. In reality they are in no way enabled to maintain their hold upon us but by means of the adscititious ornaments with which they are assiduously connected. Reduce them to their true nakedness, and they would be generally despised. Where almost is the man who would sit down with impatient eagerness to the most splendid feast, the most exquisite viands and highly flavoured wines, "taste after taste upheld with kindliest change," if he must sit down alone, and it were not relieved and assisted by the more exalted charms of society, conversation and mutual benevolence? Strip the commerce of the sexes of all its attendant circumstances; and the effect would be similar. Tell a man that all women, so far as sense is concerned, are nearly alike. Bid him therefore take a partner without any attention to the symmetry of her person, her vivacity, the voluptuous softness of her temper, the affectionate kindness of her feelings, her imagination or her wit. You would probably instantly convince him that the commerce itself, which by superficial observers is put for the whole, is the least important branch of the complicated consideration to which it belongs. It is probable that he who should form himself with the greatest care upon a system of solitary sensualism would come at last to a decision not very different from that which Epicurus is said to have adopted in favour of fresh herbs and water from the spring.
"But let it be confessed that the pleasures of sense are unimportant and trivial. It is next to be asked whether, trifling as they are, they may not nevertheless possess a delusive and treacherous power by means of which they may often be enabled to overcome every opposition?"