But a third condition may take place which presents a subject of the highest interest. The moral causes may be so far attended to, as to prevent the inclination from being followed by action; while the inclination is still cherished, and the mind is allowed to dwell, with a certain feeling of regret, on the object which it had been obliged to deny itself. Though the actual deed be thus prevented, the harmony of the moral feelings is destroyed;--and that mental condition is lost which is strictly to be called purity of heart. For this consists in the desires and affections, as well as the conduct, being in strict subjection to the indications of conscience and the principles of moral rectitude. The inclination, thus cherished, gradually acquires greater ascendency over the moral feelings;--at each succeeding contest, it more and more occupies the mind; the attention is less and less directed to the moral truths and motives which are opposed to it; the inclination at length acquires the predominance, and is followed by volition. This is what we mean by a man being carried away by passion, in opposition to his moral conviction; for passion consists in a desire or an affection which has been allowed to engross the mind, until it gradually overpowers the moral causes which are calculated to counteract its influence. Now in the whole of this course each single movement of the mind is felt to be entirely voluntary. From that step, which constitutes the first departure from moral purity, the process consists in a desire being cherished which the moral feelings condemn; while, at each succeeding step, the influence of these feelings is gradually weakened, and finally destroyed. Such is the economy of the human heart, and such the chain of sequences to be traced in the moral history of every man, who, with a conviction upon his mind of what is right, has followed the downward course which gradually led him astray from virtue. When we trace such a process backwards in a philosophical point of view, the question still recurs,--what was the first step, or that by which the mind was led into the course which thus terminated in favour of vice. In the wonderful chain of sequences, which has been established in the mental constitution, it would appear that a very slight movement only is required for deranging the delicate harmony which ought to exist among the moral feelings; but this each individual feels to be entirely voluntary. It may consist in a desire being cherished which the moral feelings disapprove;--and, though the effect at first may be small, a morbid influence has arisen, which gains strength by continuance, and at last acquires the power of a moral habit. The more the desire is cherished, the less is the attention directed to the considerations or moral causes by which it might be counteracted. In this manner, according to the mental economy, these causes gradually lose their power