As the object of this Lecture is not to give an outline of the criminal law, but to explain its general theory, I shall only consider such offences as throw some special light upon the subject, and shall treat of those in such order as seems best fitted for that purpose. It will now be useful to take up malicious mischief, and to compare the malice required to constitute that offence with the malice aforethought of murder. The charge of malice aforethought in an indictment for murder has been shown not to mean a state of the defendant's mind, as is often thought, except in the sense that he knew circumstances which did in fact make his conduct dangerous. It is, in truth, an allegation like that of negligence, which asserts that the party accused did not [63] come up to the legal standard of action under the circumstances in which he found himself, and also that there was no exceptional fact or excuse present which took the case out of the general rule. It is an averment of a conclusion of law which is permitted to abridge the facts (positive and negative) on which it is founded. When a statute punishes the "wilfully and maliciously" injuring another's property, it is arguable, if not clear, that something more is meant. The presumption that the second word was not added without some meaning is seconded by the unreasonableness of making every wilful trespass criminal. /1/ If this reasoning prevails, maliciously is here used in its popular sense, and imports that the motive for the defendant's act was a wish to harm the owner of the property, or the thing itself, if living, as an end, and for the sake of the harm. Malice in this sense has nothing in common with the malice of murder. Statutory law need not profess to be consistent with itself, or with the theory adopted by judicial decisions. Hence there is strictly no need to reconcile such a statute with the principles which have been explained. But there is no inconsistency. Although punishment must be confined to compelling external conformity to a rule of conduct, so far that it can always be avoided by avoiding or doing certain acts as required, with whatever intent or for whatever motive, still the prohibited conduct may not be hurtful unless it is accompanied by a particular state of feeling. Common disputes about property are satisfactorily settled by compensation. But every one knows that sometimes secret harm is done by neighbor to neighbor out of [64] pure malice and spite. The damage can be paid for, but the malignity calls for revenge, and the difficulty of detecting the authors of such wrongs, which are always done secretly, affords a ground for punishment, even if revenge is thought insufficient.