The remaining books of the Laws, ix-xii, are chiefly concerned with criminal offences. In the first class are placed offences against the Gods, especially sacrilege or robbery of temples: next follow offences against the state,--conspiracy, treason, theft. The mention of thefts suggests a distinction between voluntary and involuntary, curable and incurable offences. Proceeding to the greater crime of homicide, Plato distinguishes between mere homicide, manslaughter, which is partly voluntary and partly involuntary, and murder, which arises from avarice, ambition, fear. He also enumerates murders by kindred, murders by slaves, wounds with or without intent to kill, wounds inflicted in anger, crimes of or against slaves, insults to parents. To these, various modes of purification or degrees of punishment are assigned, and the terrors of another world are also invoked against them. At the beginning of Book x, all acts of violence, including sacrilege, are summed up in a single law. The law is preceded by an admonition, in which the offenders are informed that no one ever did an unholy act or said an unlawful word while he retained his belief in the existence of the Gods; but either he denied their existence, or he believed that they took no care of man, or that they might be turned from their course by sacrifices and prayers. The remainder of the book is devoted to the refutation of these three classes of unbelievers, and concludes with the means to be taken for their reformation, and the announcement of their punishments if they continue obstinate and impenitent.