243. Conditional evil desires, if they are indeliberate and express rather the propensity of nature than the considered will of him who makes them, are not formally sinful. Examples: A poor man who unthinkingly wishes that stealing were lawful; a sufferer who under the influence of pain wishes that the Almighty had not forbidden suicide. 244. Conditional desires, if made deliberately, are of two kinds. (a) There are some desires in which the condition willed (e.g., if this were not a sin, if this were lawful, if this were allowed by God, etc.) takes away the malice of the act desired, since some laws may be dispensed or changed. Examples: “Would that God had not pronounced against taking the property of others!” “I would stay away from church, if this were not Sunday.” Desires of this kind are not sinful on account of their object, which is not really wished, but on account of their end, or their lack of useful purpose, and of the danger that the conditional may become absolute. (b) There are other desires in which the condition does not take away the malice of what is desired, either because the condition is not at all concerned with the malice, or because it wishes something to become lawful which even God cannot make lawful. Examples: “I would steal, if this could be done safely.” “I would blaspheme, if God permitted.” These desires partake of the malice of the things that are wished. 245. Just as we distinguished above between bad thoughts and thoughts on things that are bad, so may we distinguish between bad desires and desires of what is bad. For bad desires that are not mere velleities are sinful, as we have just seen; whereas the desire of what is physically evil is good, if the evil is wished, not for its own sake, but for the sake of some greater good. Example: To desire out of hatred that a neighbor lose his arm is a bad desire and sinful; but if one wished this as a means to save the neighbor’s life, while he still desires something evil, it is not the evil but the benefit that is intended, and hence the desire itself is not bad. 246. The Causes of Sin.--The causes of sin are partly internal (i.e., those which are in man himself) and partly external (i.e., those which are without). 247. The internal causes of sin are: (a) ignorance in the intellect; (b) passion in the sensitive appetites; (c) malice in the will.